If you deny a party your voice if they oppose your views on fundamental issues, they have to win it back. If you give it to them no matter what, they know they don't have to listen to you.
It is simple logic. But people have been throwing out all matters of logic, like denying Biden to be too senile for another term or saying it is okay to have him just be a puppet, as long as it is not Trump. And big surprise, pushing Biden away from another candidacy turned a sure Trump win into an open race.
Imagine what would happen if the Dems started to listen to the people instead of their AIPAC handlers and stopped the genocide, like the majority of Americans and especially American Jews want. They could win in a landslide. But continuing genocide seems to be more important than stopping Trump.
Or they are willing to sacrifice their convenience because US politics need to be pushed to offer a genuine no genocide option. Most of the uncommitted movement are Muslims, Latinos and Black people. They know very well that they will suffer much more under Trump. But they also understand that normalizing bipartisan genocide against brown people will be a much greater danger to their communities and their people all over the world.