Once you get the racist or misogynist label tagged on you, you become toxic to young voters. The only issue they truly believe in en masse is that being prejudiced is the number one sin in the world. And it’s okay to violently hate anyone who they believe has had that label placed on them.
Many young people are indeed prejudiced against prejudiced people. They’ve already made up their mind that anyone who has already made up their mind about certain people should be dealt with very, very harshly. It’s just wrong to make decisions based on no evidence. They haven’t explored this belief deeply, but they did decide very quickly that this view is obviously correct and does not need evidence to verify it.
This is the sort of worldview that will not withstand long contact with the world.