They were tearing down statues and demanding public self-criticism a few years ago, but that was actually the other side.
Shutting down the universities and firing any professor who isn't politically correct is a couple of years in the future; Trump probably has to replace the accreditation system for the universities first. There isn't currently a mechanism for "sending down" suspected subversive thinkers except for deportation.
The Red Guards haven't been formed yet, though commuting the sentences of the ringleaders of the Oath Keepers and the Proud Boys is a start. (You may not be aware of this, but the Red Guards were over 10 million people.)
The news media are still independent, for all that matters.
So are almost all of the police, although Trump has said he wants to bring them under his command.
So I don't think we're likely to see that kind of widespread mass killing in the next two or three years. The organizational infrastructure for doing it the traditional way, using hand tools, can't be built overnight. Vance's ally Anduril might be able to automate the process with AI-powered surveillance drones, but they won't have enough production capacity for at least three years.