There’s nothing wrong with trigger warnings or safe spaces, per se, in my opinion.
But there’s more to it than that.
For example, I disagree with the notion that trigger warnings be mandated. You want to use them, fine. That’s great. But don’t police other content with your own standards of “triggers.” If activists are not trying to force (or at least pressure people) into using triggers, then why is it even a topic? They are.
Safe spaces are fine. They’re called homes. You can also carve out a spot in a public space with some friends one afternoon — and people who directly harass you can be prosecuted according to the law. But do not permanently reserve a public space or try to turn a class into one.