These friends overtly say that free speech should be limited, in those exact terms. Not some speech, "free speech". Please let me know how you perceive me to be misunderstanding them willfully.
I think you might want to listen to them more closely, I can't answer on their behalf.
If, by chance, they're anything like me, then I agree that there's giant categories of prohibited speech that should remain so. Lying about medicine, slander, libel, incitement to violence to name a few.
They want the first amendment repealed as they say it protects racists, homophobes and transphobes. They say that liberal free speech laws led to Trump and free speech should be curtailed for that reason. They openly say that they are opposed to free speech. I am trying to present their views as neutrally as I can, but this is what they say and support.
Maybe it’s a bit “one true Scotsmanny” but there are many who identify left or right who fall in the bottom 10% of well thought out perspectives. Being on the left does not make your friends immune and they may fall into that tier if their argument is portrayed accurately. They get the general gist of things right, I.e. neonazi propaganda is harmful, but go about things in a hamfisted manner.
Yeah I can't say I agree with your friends if that's indeed what they meant. The first amendment is incredibly important. So is the jurisprudence around what it means.
I have a suspicion that there might be a communication barrier somewhere between you and your friends. I'm a bit out on a limb here, so forgive my presumptions if they're off base. I mean no offense.
It's possible that your friends have learned that, when talking to you, 'free speech' is only worth defending when it's offensive, neo-nazi style speech. Then, without making explicit the change in vocabulary usage, they run with it -- ending up in a bad spot where they're saying get rid of 1st Amendment. There's no winners in this story, just unfortunate misunderstandings.
Again, disregard if this is nonsense. I've been witness to similar disagreements in the past, so I'm offering my 2c since I think you're making the good faith effort to represent, even while exasperated, the views of your friends.