It's a tough two-sided situation, because open-carry laws were what allowed the Black Panthers to defend people against police.
This time, the problem isn't the guns but that Nazis are there and comfortable enough to get together and hold them. If there were no guns, it would still be a problem, they just make it worse.
Cool slogan, but that is an extremely tough thing to do in any capitalist state, let alone the USA.
As long as workers are armed, the state will demand the cops are armed tenfold. And what solution is there except organizing enough to actually threaten the state? This is actually that tough.