I'm not sure you are serious, but do you genuinely believe that this was potentially from an accident? The kind of accident where you get into your car, aim at a crowd and boot the accelerator?
EDIT: I feel I should clarify a bit. I'm not saying that merely mentioning antifa or the 'accident' interpretation by definition means you're alt-right.
Furthermore, after spending quite a bit of time as a 'tourist' on some of the extreme right forums, I'm more sad and frustrated than angry. I can totally see how someone would actually end up believing the ridiculous extreme right conspiracies after spending enough time in such communities.
It's a totally different level than the BLM-related killings where the murderers flat-out say "I just wanted to kill white people".
At any rate, my point is that there wasn't any huge counter-reaction to silencing people when "the other side" did it. But one person dies due to right-wing-related idiots and suddenly this requires even Cloudflare to change their position?
The obsession with Antifa is probably that they seem like they're the same just on the other side. They idolize people that killed as many as Hitler did. They act violent, write all sorts of shit on social media, openly promote violence, intimidate people into not speaking, but there doesn't seem to be a reaction. Thus "alt-right" folks are going to view this simply as being unfairly targeted. I'd bet if people on the left were also silenced online they would not feel this way.
The two are not even close to equivalent.
We clearly didn't watch the same video.
On the other hand, the neo-nazi terrorists in this country are killing people explicitly to serve their ideology. Hate leads to action, and the last time we let these guys preach hate unchecked it led to a world war and millions of innocent people murdered. We will not let them do this again.