I believe a lot of ignorant, rank-and-file Dems think they are still voting for the Democratic Party their grandparents voted for instead of the dangerously radical Demonrat Party of today.
I believe this is going to end up with a split even in the Democrat party, for the same reasons that caused Ronald Reagan and, later, Donald Trump to leave that party. By having such an undisciplined, vacuous message, the Democrat Party courts its own swift disintegration. There may be a piece of it left that is still called the Democrat Party after all of this. But what its policy will look like is only known to God at this point.