That’s a non sequitur. What do you mean “too?” What does this have to do with the claim that “it’s not censorship if it’s not mandated by the government”?
I suspect they thought you were saying "hate speech is bad" sounds the opposite of sensible, when really you were referring to the part following the 'and'.
This doesn’t seem very sensible to me, I would even say it seems to be the opposite of sensible, probably because I am not American.