I agree with you that teachers’ unions are ruining education and many teachers do, wrongly, go along with CRT. I really don’t have an answer to this.
I do know that in the case of the teacher above, that school board member was so vindictive they attempted to prevent the teacher from getting a job in a different school system. That teacher had to make no reference to his time just taught in subsequent job applications in order to receive any offers at all.
That’s awful, seems there s/b legal recourse.