That could all be true, it seems plausible, but I don't think any of it is necessary to explain America's unwaivering support for Israel.

American Evangelical Protestants believe that the continued existence of Israel is a prophesied necessary prerequisite for the resurrection of Jesus, who will then start the Apocalypse. They think they can force prophecy by defending Israel. It doesn't matter how badly Israel behaves, they think the ends justify all of it.