I’m reminded of this Nate Silver quote from the election:

Democrats, however — and here, I’m not referring so much Silver Bulletin subscribers but in the broader universe online — often get angry with you when you only halfway agree with them. And I really think this difference in personality profiles tells you a little something about why Trump won: Trump was happy to take on all comers, whereas with Democrats, disagreement on any hot-button topic (say, COVID school closures or Biden’s age) will have you cast out as a heretic. That’s not a good way to build a majority, and now Democrats no longer have one.