Much of what you say is correct - the current US administration should have reached out more directly to ordinary Israelis, by-passing the hawkish Israeli leadership in the process. This may well have made a difference. But that doesn't mean that many Israelis are opposed to Obama not because he has ignored them, but because he genuinely represents a direct threat to the status quo from which they benefit materially. Do not write this off.
Clinton congratulates Sanders, acknowledges she has to win over younger voters (Reuters)
from the article: Why do Israelis dislike Barack Obama?