If I am a Christian does this mean I need to support the modern state of Israel? *note: please do not mistake this question as necessarily reflective of my personal option.

Where this question comes from may not be obvious to some depending on where you live, so let me explain. Here in the Southern part of the United States of America, my parents' church (evangelical, Assemblies of God) will hold, from time to time, a pro-Israel rally. At these rallies, up on stage, as well as members of the audience will wave American and Israeli flags together during a worship service. Prayers are offered up supporting Israel and afterwards a sermon is delivered explaining why it is so important for Christians to support Israel. 

It is not typical, as far as I know, to actually hold rallies in support of Israel, but the general feeling among Christians here is that they should be in full support of Israel (and by extension, support policies of the USA that support Israel).

The argument generally goes something along these lines:


God has blessed Israel and therefore is guiding them, in general, in the correct direction, and we should support this.
Based on the Old Testament, God has promised this land to the Israelis, so it is their right to have it.
The modern state of Israel is the embodiment of many of the end-times prophesies (see Hal Lindsey’s "Late, Great Planet Earth")
That Israel is the only true democracy in the region, and as Christians we should support democracy, especially in a region such as this.
That Israel is surrounded by Muslim dictatorships/extremist who would like to see it destroyed. As Christians we are against Muslim dictatorships/extremist (esp. here in the last 10 years) and therefore should support Israel.


My question: is this a legitimate viewpoint? Should we as Christians support the modern state of Israel? If you think these are legitimate reasons, then please expand. Otherwise, why not?
While I believe there are political reasons to support or not support Israel, I don't feel any of those are "Christian" reasons to support Israel.


  
  God has blessed Israel and therefore is guiding them, in general, in the correct direction, and we should support this.
  


Israel is a Jewish state.  Unless God is guiding the people to follow Jesus, I'm not sure what the correct direction would be.


  
  Based on the Old Testament, God has promised this land to the Israelis, so it is their right to have it.
  


If it is still their right to have it by God's will, then they will have it.


  
  The modern state of Israel is the embodiment of many of the end-times prophecies (see Hal Lindsey’s "[Late, Great Planet Earth][1]")
  


I'm not sure I know of any end time prophecies that require Israel to be held by Jewish (or any other) government.


  
  That Israel is the only true democracy in the region, and as Christians we should support democracy, especially in a region such as this.
  


While politically many will say we should support democracies, I don't think the Bible tells us to support democracies.


  
  That Israel is surrounded by Muslim dictatorships/extremist who would like to see it destroyed. As Christians we are against Muslim dictatorships/extremist (esp. here in the last 10 years) and therefore should support Israel.
  


I don't think we should be declaring war on Islam.  As Christians we are called to be peaceful.