I've often wondered the same. I think all jews seek to undermine their host nations and attempt to enslave all of mankind eventually per their religion. American jews seek to destroy America in the most typical jew behavior observed throughout all of history. Israel, while I'm sure due to their religion would also like global enslavement, sees America as kind of a retarded bodyguard. It benefits Israel defensively and of course financially for America to be somewhat healthy. Finally, Trump supports Israel because he is like every other politician, he has to tow the jew line to get anywhere, he's shabbos goy.