A lot of people did in fact set aside Gaza until Trump was stopped. As for those that didn’t, they should have listened to Bernie Sanders. I did months ago and went all-in on Dem support. There were multiple times when I wrote up an angry post about US support of Israel and then didn’t post it because I didn’t want to turn a voter into a non-voter or worse a Trump supporter.
I understand their position of never rewarding ethnic cleansing and war crimes though. They chose to make sure the Dems know they would never “settle” for the illegal killing of civilians. The support for Israel made it especially hard for Arab Americans to vote Dem. It’s difficult to support a party that has been in power during the whole conflict yet gives unconditional support for the internationally condemned murder of Arabs.
I’m sure a lot also felt disenfranchised by the bipartisan protest suppression and condemnation. Even in Dem states peaceful protesters were punished, and sometimes pro-Israeli protesters who attacked got away with it. Then there was the whole “vote with us or else” pressure that went on for months. Dissenters like the “uncommitted” voters were insulted by the party that wanted their unconditional support.
So it’s not like it’s completely insane. But as Sanders points out that position only makes things worse and has done so.
Conservatives want their women to be able to get abortions while also being able to tell everyone they oppose it. It’s a phenomenon you can look up called “the only moral abortion is my abortion”.