People didn't just suddenly start killing jews in nazi germany. It starts with a shift in sentiment and you probably want to stop that before it gains momentum. That makes me understand how e.g. the "there are good people on both sides" comment made people feel unsafe.
> workplace example
That seems so much like a right wing caricature of "the left" that I'd like to read a source to make sure it isn't just exactly that. Not that I'd expect this to never happen... stupid people can be found everywhere in society. A more plausible scenario leading to this might be affirmative action (something I'd expect you to vehemently disagree with anyway) having its budged cut and someone still trying to go through with it by combining multiple things into one, even if this subverts pretty much the entire purpose. I'd expect reasonable lefties to have a similar stance on gayness checks as they have for sex checks on bathrooms... people will generally do the right thing and abusers should suffer consequences.