This may feel like a no true scotsman, but it really isn't - those that oppose free speech are not true liberals. The heart of liberalism is individual freedom,

This may feel like a no true scotsman, but it really isn't - those that oppose free speech are not true liberals. The heart of liberalism is individual freedom, responsibility, and culpability. True liberals believe that speech that does not directly evoke violence (such as Holocaust denial) is not violent. If somebody hears that speech and decides to become violent, that's on them. Believing that we need to restrict what is said in the town square because people will get bad ideas, believing that people are not free but just a confluence of the ideas around them, believing that people need to be led by an authority - these are the classic arguments against liberalism. You're trying to say that liberals are reciting anti-liberal talking points within their community regarding whether this kind of free speech is good. I think it's far more likely that these people are not really liberals, and just consider themselves to be liberals because it's the most popular political ideology of the day. We should not call those that recite anti-liberal talking points "liberals" - to do so is to rob the word of any meaning at all.