They have faggots, communists, ANTIFA, and BLM activists as educators, and administrators. They promote those ideals openly during the school day, for years, indoctrinating the students.
The parents are upset. They have a right to be.
Just going to throw my experience into the mix. I got out of High School not too long ago (a number of years back), so I'm going to assume that my experiences are recent enough to be relevant. I have friends from across the country, many of whom are still in High School, and I've discussed this same topic with them.
The only ones I've seen that experience having teachers force their ideals onto the student are those that go to Catholic schools or private schools. And that's not even every Catholic school or private school, I had friends who made it through one or the other with minimal indoctrination in the vast majority of subjects, leaving the forced ideals for a selection of theological classes or events.
Now, I don't know exactly what's being taught in schools that I didn't go to or that my friends didn't go to, but I do know what was taught in those schools. I lived both in the north, in a rather left-liberal area, and in the south, in a
very right-liberal/conservative area. I went through Elementary school in the former, and Middle/High School in the latter.
I may very well have had a gay teacher at one point, might've had a communist one, maybe even someone from
Antifa. But if they were part of any of these groups (if you can even call being "gay" a group) they never expressed it at any point, taught any ideals associated with it, or manipulated the information to fit any supposed agenda.
Now, I'm not an expert in every subject (or any subject, if you want to be technical about the word "expert"), so I can't guarantee that I'd always be able to catch this bias. But I attended a number of history classes, as well as a civics, sociology, and psychology class.
In the history classes, what was studied in the class generally went along with the material I'd consumed in my independent studies, and when it didn't, I generally would bring it up to the teacher, and we'd have a respectful and open discussion. Sometimes I misremembered something, sometimes he did.
Now, civics, sociology, and psychology were slightly different. In these classes, we would have open debates about many topics, debates which the teacher would moderate, and sometimes interject to challenge
both sides in their ideals.
The experiences of my friends have been rather similar, and they take interest in almost identical subjects, perhaps to a greater extent than I do. Many of them live in rather left-liberal areas, one of them even in Southern California. I'll admit my experiences have been slightly better, in that many teachers at their schools don't really care, and mine happened to be very passionate about teaching, but that's another topic.
Not saying this whole indoctrination thing doesn't exist, but if it does, it evidently isn't a pandemic that's spread to every other school.