I think a good way of understanding this is that liberals have very few differences with fascists, but liberalism is normalised. You wouldn’t be polite or non violent with a fascist. They either go jailed and in a reeducation camp or dead in a coffin.
There are cases of ignorance and people need to be educated, but there are cases of ideological afirmation which do not deserve any good response or treatment.
I think, though, that personally, beyond of this point as a movement or whatnot, it hurts one psychologically and because of that it should not be followed. It triggers rage and it is not a good thing to live by. Lenin may have been snarky, but he didn’t exchanged letters with 20 politically analphabet liberals a day. I think blocking is better since you won’t even produce anything good with them any way.
To the lost democrats reading this, this also applies to you, not only to republicans. Both of you are liberals, only one of you is more honest with what they want to do with minorities.