My contention:
1) Israel is a nation with limited natural resources surrounded on all sides by hostile people. Six day war and Yom kippur are two examples where they had to fight a war completely surrounded except for the ocean
2) Israel has nukes and will use them to survive.
3) Israel needs the US to survive, period. With our support eventually other nations will overwhelm Israel.
4) When faced with being totally overrun, with the knowledge that the US will not back it up, at least materially or "spiritually", will put Israel in an apocalyptic situation. Memories of the holocaust still linger. As the nation has nukes, this is a bad thing.
5) Israel is only nation in the region that is not a barbaric stone-age cess pool.
It's your right to believe that Israel should exist on their own. They have done many things I don't agree with. But I personally see more benefits than drawbacks to giving them the support we do. Netanyahu's speech before the UN was a stunning indictment to be honest.
So I do support Israel.