This, they intend to create the illusion of 100% support for Sanders and will allow no dissent.

Of course, a typical way to stop a movement is to create dissent, so from their point of view they're doing things in line with their intentions.

And undoubtedly they get a lot of spam and the like, so he's like a fly on the wall that got swatted because they're so used to just banning and removing whenever there's a slight question.