Not our job to be the policemen of the world, or for our taxpayers to give Israel blank checks. Donate the money yourself if you want to help them.
Fact of the matter is that you will ALWAYS (as in for eternity) have problems when you hand over land designated to be ruled by a specific ethnoreligious group in a larger area that is dominated by another ethnic group. This problem will never go away unless/until one side is exterminated, unfortunately, so I don't see it as a good idea to be involved with. Plus, it puts our entire country at risk of a nuclear incident, another 9/11, etc.
The problem gets worse when the Israelis continue to ruthlessly murder children and women.