You have my sympathies. Sounds like you were taking the liberal approach.
My best hope could be that the students were a tad offended by the usual requisite pandering, but my hunch is that instead the school admin was on to you as something of a Freeper type—and just looking for an opening.
I am a lifelong conservative and I failed at trying to e a liberal. I can’t succeed either way. Fron now on I will not single out any minority stukdent. Even if they are doing cartwheels in class, grabbing eacthothers crotch, cussing out the teacher or kneeling for the flag!