I think the framing you're proposing is off; what the right has done are things that are offensive to leftists and as a result they're banned. It's tautological. This is exactly the premise of the criticism levied in this thread and writ-large at Twitter censorship.
Nick Fuentez (well, racism and antisemitism), David Duke, I'm sure there are more but these are the only examples I know off the top of my head from being terminally online