Odd protestant interpretation of savoring "Israel"
+
Expats dominated land used as sphere of influence towards the arabs
(though the costs may not outweigh the gains at this point - but that's a difficult thing to estimate, given the US is who prints money and the debt thingy is vague/possibly resolvable)

I don't know when/how the Jewish lobby started being strong in Washington. Maybe they were always strong on the East coast.