Arguably, the last Presidential election was lost because the candidate was insufficiently anti-Israel. I heard a number of people claim that the incumbent's support for Israel during the Gaza conflict was sufficient to reject his hand-picked successor.
It's impossible to know for sure, of course. I do not trust people's claims about their reasons. If she had somehow taken a position that would attract their votes, I can't know how many votes that position would have lost.
Nonetheless... AIPAC didn't make an endorsement in the last election. I don't think that she could have taken an even-more-pro-Israel position and gotten their endorsement. So it may well be that the only path forward is to hope that the anti-Israel crowd would vote if they were pandered to.
(I'll note that I don't believe that they will. I am quite certain they will find some other reason not to vote. But options are becoming thin on the ground.)