If I had to wager a guess, it likely more of a backlash against .ml and hexbear more than anything, which are unfortunately the main ambassadors of "leftist" ideology on the fediverse. These instances legitimately make leftists look bad, to the point where it actually feels like it has come all the way back around as self parody.
It is crazy to me that all of the "Genocide Joe" crowd don't see that Netanyahu wants Trump to win so he can show the world what genocide actually looks like.
Well, not that crazy, considering a good portion of them are propagandists.