I’ll give you a glimpse into leftist spaces real quick: most people in there thinks Bernie, AOC, Warren, and even Katie porter are sellouts/traitors due to being slow or silent on their support of global colonialist projects. Likening them to a Kristen Sinema-esque person in progressive’s clothing. Having them agree with Biden not only reinforces this opinion leftists have of them, but it becomes plainly obvious that none of them would have jobs anymore if Biden doesn’t win, so it’s in their best interest to capitulate towards the status quo.
If he was to break our arms partnerships with Israel and abstains from all future UN votes on Israel (which in no means fixes the situation here or abroad), I’m sure progressives could go back to holding their nose and voting for him. Honestly, so much shit needs to be addressed that’s being ignored. The fact that there’s multiple “cop cities” being built in the US is appalling and worthy of withholding voting for someone who won’t address that alone, but still, progressives and leftists are used to holding our noses when it comes to horrific things we vote for, which is probably why hearing that we might be withholding due to genocide, liberals are collectively freaking out.
As far as the limits of his capitulation, he doesn’t have to worry about liberals as they’ll vote for him even if he’s literally committing a genocide, so I’m not worried about them unless gas prices start to rise and they blame him for it. Republicans have been poisoned against democrats for decades- I honestly think maybe only 5% of Nikki haley voters would consider voting for Biden. The Arab community are watching their homes and families getting decimated with the help of Biden, so it’d honestly be hard to win them back through capitulation (even though he should try). Leftists and to a greater extent progressives are the people phone banking, going door to door, getting people registered, working polls, etc, and while their numbers aren’t great, losing them is really rough for his chances at winning.
I think if he broke our arms deals, the right would scream that he’s pro-hamas like they’ve been doing this whole time. CNN and other establishment news agencies might also saying that too since their profits relies on the status quo staying firm and headlines being emotionally charged. Immediately AIPAC donations would be halted and they would push candidates who are pro Israel to run against anyone who calls what is happening a genocide (this is already happening). Winning statewide elections would become more difficult if Biden capitulates to leftists and progressives with regards to financing a campaign. I think the backfire is less against a specific voting bloc and more with the sudden stoppage of political donations. Maybe he’s waiting until AIPAC can’t sponsor competition for state elections before voting season, but it’s at the cost of Palestinian lives obviously. I’m also of a mind that the better and more relatable your ideas are, the less campaign money you need to advertise (to a certain extent). So honestly, if Biden wanted to be really sure he’d win instead of just winning back progressives and leftists, he should honestly pull out all the stops and push for popular policies. Call on congress to kill the filibuster and pack the court if you need to.