> what really irks me about your post is your complacence with cheating because it’s not in your self-interest to pursue those who cheated
Why don't you hold the other professors to the same standard? It's not as if the other professors are oblivious to rampant cheating. But what's the point of trying to catch cheaters if it hurts the class dynamic and if those who get caught don't even get suspended? The students are clearly OK with cheating otherwise the cheaters would be ostracized by the other students. The school management clearly doesn't care, since they don't take action against those who are caught red-handed. The teachers who care are punished for it: bad reviews and bad class atmosphere in return for extra hours on top of an already heavy schedule. And yet you don't thank the professor for trying to fight against cheaters (and losing that fight) but you effectively criticize him for having tried in the first place!
> discussed it and concluded you were just racist
A teacher is in a bad mood when a significant portion of the class is exposed as having no academic integrity, doesn't want to teach the class but still, according to your own words was a "great teacher in the classroom" and "gave good lectures". How do you explain his bad mood? Why of course, he must be racist.
> all the students had received your email demanding those who plagiarized to come in to talk to you, naturally everyone, even those who didn’t cheat, felt very uneasy and worried
This exact scenario happened in a class I attended some years back. Guess who felt nervous? Those who knew they cheated on the assignment and those who plagiarized habitually but didn't remember whether they plagiarized in this instance. The students who would never, ever, ever, copy-paste plagiarize did not feel the slightest bit worried. I'm sure you "collaborated" with a friend on a small part of the assignment. Yeah, that's the word all cheaters and plagiarizers use.
> teaching evaluations don’t just measure your ability to give good lectures
If you give a better evaluation to mediocre teachers who smile and say sorry when they're late, then that's exactly the kind of teachers you're going to get instead of the teachers who are great in the classroom and who teach classes where you learned a lot.
Save your post and re-read it a few years from now. You'll probably be able to see it from a different perspective.