So why are they all given a pass? It's because these tech companies are comprised mostly of left-leaning staff and are willing to now exercise their power against everyone else. Until Twitter, Facebook, and Amazon deplatform every single person and group involved in the hundreds of events in 2020 that involved criminal acts, these new acts of censorship will remain discriminatory and unacceptable.
And I frankly don't care much for your example. My grandfather was a Pole who had to fight Nazi invaders, and I have no reservations about him having to put a few bullets over them.
Nazis and fascists do not want a free and fair society. They delight in the violence of it and have no interest in a marketplace of ideas.
Don't take my word for it. Listen to community activist Victoria Beach explain how she is upset for them terrorizing the area and hijacking the Black Lives Matter movement.
Having spent a few years on the Fediverse, I've found that "the left" in the US consists mainly of book clubs and struggle sessions.
The book clubs just read and debate theory ad nauseum. They're a joke, and if you gave most of them an AR-15 they'd shoot themselves in the foot.
The struggle sessions look for people slightly less poorly off than themselves to bully. If they can't find a right-winger, they'll happily go after somebody who's only 99.999% on board with their program. Failing that, they'll pick one of their own at random, accuse them of insufficient ideological purity, and bully them. They're a joke, too, only not quite as funny as the book clubbers.
Fuelling hellflames is against the site guidelines, which ask you to flag egregious rather than replying to them (a.k.a. please don't feed the trolls).
We're trying for something else here than internet default and need users to know the intended purpose and stick to it.