What Justification can be found in revealing contradictions within the Bible? With various, claimed, contradictions within biblical text, 


  Jeremiah 17:4 - ...it [anger] will burn forever.
  Jeremiah 3:12 - ...And I will not remain angry forever.


I have seen many that have broken down the text, but we seem, as a society, and many of those that I know that claim much the same, accept things like black holes, or holes in space-time, and other very real seeming intuitive contradictions that have a very real impact on the nature of reality.
People seem content to believe that the nature of reality is not what we thought it was, and find logical contradictions in the truth of the nature of reality, but find it easy to tear down religiously philosophical views. What possible justification can be found in taking these seeming opposing view points?
Here the skeptic attempts to pit Jeremiah 3:12 (a promise to Israel that God will not be angry with them forever) and Jeremiah 17:4 (a statement that God’s anger over sin had been kindled and will burn forever) against each other. 

In Jer. 3 God is calling Israel to repent of their sin and turn back to him and promises that his anger will not burn against them forever if they do. In the second passage, God is referring to those who do not turn back to him and how his anger against sin will never end. Thus, the contexts reveal that what is being addressed are two totally different situations. One addresses God’s forgiveness of persons, the other God’s holy hatred of sin. They are simply not even talking about the same things and thus cannot be contradictions.

Also, worth noting is that “forever” in this case is a hyperbolic statement meant to show the seriousness of the offense.