I dunno if people know Biden's past as a darling of the Israel lobby. Obama used to attend pro-Palestinian events and knows very well what's going on, part of why he picked Biden was because he was disliked by the Israel lobby, and that was his way of courting them. Of course at the helm he had to go back on his views. That's kind of the point here too, what's in the best interest of US foreign policy is largely determined by the military industrial complex, voters don't have a say in this really. Neither does the President in a lot of respects either, because furthering the country's foreign policy is more about what America is to the world than what the parties are to Americans.
Given Biden's poor polling in basically every swing state against Trump the party should really be picking a better candidate if they want a guaranteed victory in the election. I'd be doing the same as these Muslim groups if I was in the US because I'd want the Democrats to win, I don't see a way forward for this right now without the party stepping up with some major changes. What I see instead are Democrat voters shaming potential Democrat voters in to voting instead of demanding the party do better, and yes it's true if those people voted we wouldn't get Trump again, but saying as much is more about validating your position than actually doing the work to get that victory. I feel like at this point Democrat voters are just going to shame people for caring about genocide and there's no way that's going to get them votes, probably more the opposite.