It would be a huge mistake for Israel to depend to much on the US for support and military defense. There are too many powerful interests in the US who are anti-semitic and Obama certainly represents that. US support for Israel should include encouragement for Israel to act in its own interests independently and not just as a tube for US foreign policy in the area.
Netanyahu pays hospital visit to family of Palestinian infant killed in arson attack (Haaretz)
from the article: Indyk: If Israel manages alone, it can decide alone