>

He said one side was "much less susceptible to" outrage fatigue, without specifying which is 'his'. IMO both sides' outrage levels look pretty similar, just initiated by different triggers.
I think that some people have a more tribalistic view of politics, which involves "us" and "them" dichotomy, much like a professional sports game or war.  The other political side are the bad guys or team.  In sports and war, people don't get outrage fatigue.  Our side is righteous and just, and their side is evil.  They must be vanquished.  Politics is a zero-sum game, and we are going to win it! 
Others may take the view that we are all in this together, and should be working toward certain mutual goals (generally for the greater good), but due to either ignorance or greed, some of the people on our big national team are working to put their own interests first or are being misled by those who are.  Politics feels like being on a giant committee with a bunch of... "difficult people" let's say, who at best make it impossible to achieve anything.  As a result, we are stuck in a really long meeting, working late, and we would rather be at home eating ice cream and watching TV. >

This, I believe, is the correct answer. People who are center-Left and center-Right have more in common with each other than either group has with their extreme counterparts. People in the middle may disagree on the best course of action, but both genuinely want what's best for the country. People on the extreme ends are focused on winning and being right and subject their members to either woke purity tests or asinine conspiracy theories. >

We’re a nation of rage-aholics.
Half the country can’t even function without their Rage-ahol. >

But why? Is it because of the inherent message, or how it’s presented? Is this inevitable in any system, or just how we have we cultivated it.. >

It isn't just politics.  Every single day, from every possible avenue, we are under a barrage of  political, religious, & economic propaganda; news handpicked to be sensational, bloody & divisive; leaders who are hollow, self-serving, and even outright predatory; government and commercial institutions that are corrupt . . . and much of it so ingrained in the identity and function of Western Civilization that the corruption and disfunction these problems bring continue to go unaddressed, even lauded and buttressed, decade after decade.
And all the while we are presented, through advertising and cultural escapes, with a continuous lie that things are working as intended, and if that is not the case for YOU in particular, perhaps you are using the wrong laundry soap.  Or you haven't tried the latest Grease N' Carb Classic from McDeath.  Maybe you're paying for more than what you need? (TM).  Have you asked your doctor if freaking out in public over a minor issue is right for you?  
We all know the lies, and we all know the total width and breadth and time we have invested in them are what is driving us right off the climate cliff.  We can feel the cladding coming loose.  The foundations seem far less like Manifest Destiny and far more like Inevitable Doom.  And some of us are going mad sooner than others.
edit:spelling >

if you get off reddit, most of this goes away. it's nice, and why i'v come to hate this website... just wish there was a decent alternative as for some reason the internet decided this is the place to host all kinds of forums for various hobbies I have and not have individual places outside this place full of censorship and bias.... the comment voting system is the worst idea to come out ever. >

There is a good more turmoil of the human spirit in the world, and even just here in America today, than can be ascribed to just the users of reddit.  The wheels are coming off, and on some level, in my experience, a lot of people know it.  They know there are no real solutions in sight.  They know every year they have less and a smattering of individuals have a great deal more.  They know that far too few in power are really interested in the kind of change it would take.  
It might take another hundred years, but the fatal flaws are built in.  Perhaps what is left of humanity can achieve a more symbiotic relationship with nature, but our present societal structure, IMO, has almost no hope of survival.   
Or perhaps I am just going mad. >

oh I agree people are seeing the wheels fly off the cart and no clear solutions to fix it. Most people just keep doing their thing though and ignore national politics. if they did watch it as much as reddit does, then we would see a lot more than what, 40% or so people voting... >

I could write paragraphs about it but I won't. It's a dopamine rush. It's like the experiments with the rats who press a button and get cocaine. The rats simply can not stop and end up dying.
The 'viewer' is the rat. The latest 'hot topic' is the cocaine. The channel is the button. Only this time the viewer doesn't die, they just buy a flag. >

I wish that was all they did. >

Personally, I think it’s a combination of extreme individualism and atomization that’s lead American society to this point.
Everyone is mostly alone and atomized. They’re living in echo chambers and they’re convinced that their personal politics are all that matters.
This leads to the rage machine. Everyone feels aggrieved, to some degree. The patients are running the asylum, essentially.
Our institutions and social fabric are so broken we’re just throwing poo at each other. >

My outrage has diminished greatly. I told myself in 2020 that after the upcoming presidential election my shift was done. No more destroying my peace of mind because a bunch of people are idiots. 
And to my utter amazement I was mostly successful. If people want to drive this car off the cliff, there’s nothing I can do to stop them. I’ll still vote of course but I won’t let events destroy my own well being or turn me into someone I don’t want to be.
I’m still pessimistic about the direction we’re going, and I think as things degrade people are going to get angrier and more reactive, but my new goal is to maintain my sanity, patience, and love of humanity as society unravels. That’s what I want to bring to this increasingly unhinged culture of ours. Doing that will be the real victory. Wish me luck. >

I wish you luck friend. much the same for me. I do what I can do to control my life, stock up on items that may be necessary some day if these outraged people go too far (like during the riots, had a rifle next to me... there were rioters in the town over from me...) and just wish to be left alone but it seems that a lot of people refuse to leave me alone...
Some day i'l be able to afford a bit of land in the woods where I can put a modest house, hell even a trailer at this point I don't need much room... so that way I can truly be left alone from all of this insainty. oh an it would be sweet to be in nature all the time (i'm currently living in a city... I hate it) and be able to pop off a few rounds from a .22 pistol before I go to work in the morning to start my day. >

I'm no psychologist, but I kinda wonder if the answer has something to do with the issue of variety and novelty.
On the left, the outrages tend to stay the same: we can't end mass shootings because we can't get gun control, people pay exorbitantly for healthcare which ought to be a human right, dark money is ruining politics and keeping power concentrated with the 1%, etc etc.
On the right, the outrages change every week. Unisex bathrooms! Trans athletes! CRT! Hunter Biden! Unsexy M&Ms! Gas stoves!
The right-wing rage dispenser keeps churning out fresh new outrages to keep the cultists from getting burned out on any one thing.
Anyway, just a thought. >

There have been some studies on the effects of right wing cable opinion shows and talk radio that shows they’ve mastered the art of hooking their audience via a constant stream of outrage and soft porn, cycling at measurable intervals. It does weird things to the brain. The people with normal emotional balance are not the people who have favorite hosts. >

Literally every time I go to the gym I see some headline on Fox News that is designed to stoke outrage. >

If one doesn't believe that Truth exists independent of our belief in it, their potential for outrage is endless. 
A Truth in x necessarily puts parameters around any other variable connected to it which limits what can be True in y to only that which also comports with x.
Without the limiting parameter rooted in the Law of Non-Contradiction, something cannot be what it is not, the capacity for rage is limitless because it's a power game at that point and what matters is a vanquished opponent who's wrong by virtue of being an opponent rather than their argument being wrong. 
What was True until 5 minutes ago(supremacy of natural immunity & children require facial expressions to learn verbal communication) was "no longer"  True because neurotics couldn't deal with reality that they were being lied to and there's mountains of evidence, hence the genocidal outrage of so many such people. Such people can be led by the nose everywhere because they can't see the parameters showing what they're being told is wrong. Perpetually emotional people are generally those with no limiting parameters to their heuristics so everything is true or false based on how they feel. >

Not all outrage is equal. Florida whitewashing history is not equal to you no longer being eroticized by m&m. >

Let me guess OP, is it the other side that has this massive fake outrage problem and your side that reacts in a perfectly sensible manner? >

This is interesting. OP merely showed curiosity about how much outrage is out there and that one side seems to get fatigued before the other. I don’t see where OP mentioned any fake outrage, or either side being “sensible” in their outrage. Seems we are seeing one of the causes of this divisiveness in real time.