People (eg, sex workers) have been getting deplatformed (often with the government assisting in - or requiring - the deplatforming!) for decades, and I didn’t hear the free-speech / right-wing types complaining.
But now that some private companies don’t want to support racism, it’s a brand new problem we need to fight against? :P
(I agree with the overall point that censorship is a two sided blade; just find it funny when some people think that this is new, when in fact it’s been happening for longer than I’ve been alive, it just seems new to them because they’ve never been on the receiving end before)