Antifa is not ‘anarchist.’ They are paramilitary wing of the Democrat Party.
If anything, they are Totalitarians.
(Antifa got its start in 1930s Germany as a rival to the Nazis, competing for the same followers, using the same tactics.)
So, when the violent behavior of Antifa finally turns enough people against it, the Democrats will drop that group and find another violent group to carry its banner. Just like the Democrats have done in the past with the violent Nazis (yes, some prominent Democrats supported them and wanted to ally with them) and the violent KKK.
I would not be surprised if in the future a legit gun owners may put their guns to good use.