Basically but instead of catching Pokemon...you just punch people who are racist or who promote violence on innocent people.
Freedom of speech means the government cant do anything to you....doesnt stop a good citizen from knocking some sense into you or just knocking you out.
That doesn't make you a good citizen. It makes you a useful idiot.
Antifa are useful idiots. When a free society has rules to prevent the people in power from abusing that power outright, the most effective circumvention is to divide the people and convince them to do what you want for you.
Government can't legally censor you, but a pack of self-righteous, head-up-their-own-ass rabid citizens can. Can't legally use violence against political opponents? Convince the people they will be unquestionably justified in doing it for you. "I'll be on the right side of history! I cant possibly not be in the right, because I'm not those other people" is a hell of a drug. Road to hell, good intentions and all that.
This kind of thing never ends well.
Once you notice that you're saying this in defense of nazis, a group of people that preaches ethnic genocide, then it falls fucking hard on its face. ---