When I was a teacher, there was a distinct group of kids who always pushed the boundaries to see how far they could. They presented endless reasons for why they wanted to do what they wanted to do, with no regard for how ridiculous they sounded. They were smart and creative, and knew what they were doing was unwelcomed. They just wanted to see how far they could push the teacher. That's exactly what this feels like. It doesn't stop, until we put our foot down. It doesn't have to be nasty, but it doesn't require we entertain weak arguments about people's psychological comfort demanding we change behavior either on the defensive about how we are not oppressive.
Yup. This stupidity will backfire badly. In the latest list they are essentially destroying the language itself by removing gendered pronouns. How do I wish Spanish without them? Or phrases like "you guys" which is gender neutral. Frankly, these people are hurting the cause as much as racists and sexist people are, maybe even more. This will not be supported but anyone with a brain and frankly neither will their original causes. This idea that people need to feel "safe" and therefore others should modify their speech is mad. The only response to such idiots is to tell them off, to say "fuck you idiots" and ignore them. I think it does have to be nasty indeed because these morons have shown time and again they do not listen to reason.