That's why I'm more in favor of having the police crack some skulls when Antifa shows up and causes a ruckus instead of trying to dissolve them through law.
This is a position which is patently incompatible with being against punching national socialists. If you're okay with deploying an unconstitutional use of force against one group you disagree with, then there is no reason you can fault leftists for wanting to stop national socialists through violence.
It's actually a bit worse than that, since national socialists pose a longer-term threat to American democracy than a bunch of young serial-vandals pissed about Annoying Orange.