The past four or five years of involvement in gender-critical feminism has led me to one obvious conclusion: lots of people are very stupid. Even people you previously thought were clever are often stupid. People you imagined were capable of critical thought follow the crowd, just as much as the sort of people who voted Trump or who think Bill Gates has put a chip in the Covid vaccine. The only difference is the crowd being followed: what's fashionable amongst the supposedly educated middle-class is different from what's fashionable amongst the uneducated and unskilled.
I agree with this, but I'd add that it's not your classic old-skool stupidity, but a sort of new version which is based on laziness rather than lack of intelligence. It's like they've sort of outsourced their thinking to a few blue tick twitter voices and social media commentators and they don't see the need to unpick things for themselves because the verdict on x, y, z matter is already in. The gavel has come down. Transwomen are women. T**fs are evil. Those are the facts, hadn't you heard?
It's stupidity of a more pernicious sort. No one should ever be denigrated for their intelligence level, but actively choosing to suspend your critical thinking ability to go along with the prevailing narrative is pretty indefensible.