I can put the politics aside. But the ethics? No. The_Donald might be awful, in your opinion. But what spez did isn't just awful. It's the canonical example of bad behavior on the internet from a mod.
Interesting way to put it. "in your opinion." Are racist comments and harassment awful only in "opinion"? Are we not at a point where spewing racism in a public forum is not "factually awful" now?
I've been to the -chans, and I firmly believe in freedom of expression (my opinion is more complicated, but I'm simplifying). So while I think they're awful, I still think that people should have a place to say them, whether or not that is reddit.
Also, while I think it's awful, there may be others who do not.
According to anti-discrimination laws in many countries, not exactly. Some of it is down to judges opinion but many times there are concrete boundaries for what is considered both harassment and racism.
You say that like this is some new phenomenon. SRS has been around for as long as I can remember. It's probably one of the most vile harassment engines because it disguises itself as a wholesome cause.
Just because we think what spez did is disgraceful doesn't mean we're a bunch of alt-right Donald-worshipers. I'm not a fan of either, I just think editing message text like this is disgusting.