I cannot applaud this enough.

What the author keenly observe is what has been called “the illiberal left”, where progressives have been more and more adopting intolerant stances towards anything outside their ideology.

See for example: The Economist, “The threat from the illiberal left”, Sep 4th 2021

https://www.economist.com/leaders/2021/09/04/the-threat-from-the-illiberal-left

This kind of therapists are a stark example of this ever-spreading tribalism, because they’re supposed to be open-minded and accepting towards their clients, no matter what. When they cannot, they should acknowledge it and refer the client to someone else.

If you feel "triggered" by something, it's YOUR issue, not your client's.