There are some other things transpiring in American politics right now. But we must note that Democratic leaders are now unabashedly stating what Bernie Sanders supporters said over and over in 2020: the party pushed Joe Biden primarily to stop Bernie.
You should be rejecting it because it’s opinion rather than “information” (mis or not), not because an online theory exists which codifies the opinion. And it probably should have been reported for Trolling in the first place. That’s not a comment intending to do anything but start a fight.