It’s because they’re positing that it’s only people on the left that do this.
I’ve heard it said that the enemy of extremists isn't the extremist on the other side, it’s the moderates. Extremists are itching for a fight, and they’ll continue fighting forever. Moderates and pragmatists stand in the way of that goal. If an extremist group were to win and completely eliminate the other side, they’d draw some other battle lines within their own group. “Othering” is important to extremists, and the’ll find a way to do it.
I’m another proud lefty. I marched with Black Lives Matter last summer, voted for Elizabeth Warren in the primaries, I’m vegan for all the reasons people think are stupid. All of that is true, and it infuriates me to see leftist extremists getting dressed up in black and setting buildings on fire. It infuriates me to see leftists gatekeeping on Twitter, and taking such joy from tweeting people’s employers to try to get them fired for the crime of making a joke that didn’t pass a purity test, or for having a counterintuitive take on something complex. Internet pile ons are the worst.
All that said, it confounds me that people on the right seem to be unable to see these traits within their own party, and aren’t working harder to rid their ranks of QAnon, Proud Boys, and Trumpism. It seems like anyone on the right who has the temerity to point out these problems gets branded as a RINO (Republican In Name Only) and expelled from the party. Jeff Sessions – JEFF SESSIONS – was cancelled by the right for not being right enough.
So, yeah, there’s a lot of projection going on all around.