It's quite a long article and covers a lot of ground, but basically it posits that the kind of catastrophic ('Terfs want to hurt and kill transpeople'), black and white (TWAW, No Debate) and emotional thinking ('Ignore the facts, be kind') that we associate with TRAs and young people is responsible for actively causing depression — particularly among young liberal women. Being conservative and less inclined to being a bleeding heart offers some protection.
Haidt points out that CBT, used to treat depression, is designed to tackle and dismantle these unhelpful ways of thinking, but movements such as genderism instil and rely on them.
jonathanhaidt.substack.com/p/mental-health-liberal-girls?utm_campaign=post&utm_medium=email