Had she dropped support for Israel, she would have been president.
And going forward, there will never be a Democratic president that supports Israel's continued existence. The Democratic base is fully against Israel. We're just waiting for the politicians to catch up.
Edit: man some of you REALLY don't want Israel to be blamed for anything. Anyways, here's one poll clearly showing it was her support for Israel that cost her the most votes: https://www.imeupolicyproject.org/postelection-polling