This is only a real argument if they were counterprotesting something harmless. But they're not. They're counterprotesting neo-Nazis and other kinds of modern fascistic and / or hate groups.
This is why the OP specifically said Proud Boy rallies and the like don't count. Something you ignored in your latest post. Because that's shutting down something that in of itself is harmful. But there's no recognition of that from you (or others). You expect these hateful, violent groups to be defeated in what, exactly? The "marketplace of ideas"? Antifascist groups have arisen out of a common failure in both society and law to tackle these kinds of hateful, often militarised, groups.
What is ironic is your posts put more time into defending such groups right to exist. Free speech isn't absolute. You even liked a post detailing that (which means you at least understand what was written - I try not to guess why folks like posts). Ergo you cannot rely on absolute free speech as a defense for people espousing, for example, white supremacist rhetoric. I don't believe you do this maliciously at all. I believe you have bought into the modern trap of assuming anything goes away if you debate it hard enough.
We have a habit of assuming things "can't be that bad", or that X or Y are solved problems, by dint of living at the forward edge of recorded history (it's actually a mindset I've seen in relation to the current pandemic, too). Things can't be that dire, right? Things can't be that bad, ergo antifascist responses to some things must be overblown.
But that's an assumption. Why don't you put more time into the folks actually running into people with cars, instead of finding a way to blame the victims?