There is no reason why Israel is propped up by America, at least that I know of. For many years now it has been a terrible ally, and Netanyahu has interfered with American politics miserably. There is no reason why America is spending $38 billion dollars to prop up an apartheid nation, who is devoted to stealing Palestinian land. 
Well, other than Israel has powerful rich friends who prop up American right wing politicians who routinely disregard the needs of the very poor in America to reward the apartheid politics of Israeli far right politicians. American politics is bought and sold on the open market, and that is too bad, but don't say Israel is a special friend to America, it is not. It is a cash cow to powerful people in America who run our lives. 
Israel has no more right to American funds than does Ghana or Cuba or South Africa. 
There is something more dangerous to American than antisemitism, it is insane, pro apartheid far right devotion to Netanyahu.
Hugh Massengill, Eugene