This depends on is being cancelled. It's not the left that cancelled Kapaernick or the artists formerly known as the Dixie Chicks or howled with rage that the Supreme Court - with the exception of three conservative justices - ruled their longstanding practice of cancelling gay people unconstitutional.
No, but the juxtaposition of "footballers' antiracist gestures must be silenced" with "We must intervene to prevent Big Tech from declining to broadcast racism" in the rhetoric of prominent mainstream US conservatives is a pretty good indication that the longstanding tradition they are actually defending isn't "free speech"...
That only works if your frame for literally everything is racism.
Kaepernick kneeling during the pledge of allegiance can only parse as an antiracist gesture if the thing being disrespected (flag/country) is presumed to be intrinsically racist, i.e. it's accusing the whole country of racism. There are a lot of non-racist patriots who would take offense to that. The answer still shouldn't be censorship, but calling any opposition racism is accepting the very premise that the people opposed to the gesture are opposing it over.
Moreover, the implication that everyone who has been canceled was a racist is contrary to evidence unless you're making some heavy tribalist assumptions about anything vaguely conservative automatically implying racism.
And you're still not addressing the original point, which was that the left going around canceling people over speech is inconsistent with freedom of speech. Nothing anyone on the right does can make that untrue.
Show me a case of "cancel culture" and I will show you a case where the "cancelled" person benefitted in popularity on the right wing side. The people that really do get cancelled, you don't hear from them. The examples you know of are all people who benefitted hugely from the "cancelling". Unless you count the #metoo people. But you probably believe all these men are innocent. I don't really get how due process and opposition to trial by media is usually not important with right wing people when someone is suspected of robbery, but when someone is suspected of sexual misconduct it is suddenly a problem. This feels like the protection of elites (because elites will never be part of a robbery, but can be hurt by a metoo-scandal). And I am seriously curious who is calling for a new war in terror. Tell me, who is doing this?
Ok, I'll bite. First three examples of cancel culture I can think of: dongle gate, rosetta mission guy, and more recent J. K. Rowling. How exactly they benefited?