The anti-genocide people have drawn a line in the sand and decided to stick to that principle. I think it is pretty reasonable to have lines you do not cross with genocide being a pretty understandable one. These people have decided, "if you use our tax dollars for genocide, we will not vote for you".
You are asking them to, "ignore the genocide stuff and focus on the good stuff", but unlike Biden, these people have red lines they will not cross.
If you don't want fascists to come into power, then the Democrats should stop doing fascism-lite. I think it is reasonable for people not to support fascism-lite. They should indeed move further left away from the fascism they are barreling towards.
It really doesn't feel like the Democrats are the least bad option when they keep adopting Republican policies. Sure, they don't want to kill trans people or conduct mass deportations now, but it sure feels like 4 years down the line I'm gonna be asked to vote Democrat even though Harris or whoever is trying to increase police budgets to "fight rising crime" or something ridiculous.
I keep having to vote for "the least bad option" while the Democratic party only ever courts neo-liberal/conservative voters. It really seems like my options are Fascist Now Party or Fascist Later Party. If the Democrats don't listen when I vote and don't listen when I abstain, why should I vote?
I feel like it is not a winning campaign strategy to say, "vote for Democrats because the Republicans are far worse". Progressive left policies are popular amongst centrist and swing voters, so it isn't like the Democrats will lose centrists by adopting progressive policies. Everybody likes expanding healthcare. Nobody likes genocide. So if adopting progressive policies attracts voters from all across the spectrum, why are the Democrats only focusing on stuff like, "build the wall" or "stay silent about genocide"?