Being tolerant to intolerance leads to more intolerance. Being intolerant to intolerance does not lead to more intolerance.
It is not just OK, but necessary to be intolerant towards fascist ideologies.
I believe Nazis should be black-bagged instead of punched; punching them will humiliate the individual, but may also unite the group or serve as propagnda for accelerating their agenda.
There’s some 48 Laws of Power (it’s okay, you can cringe.) such-and-such about only attacking an enemy if you can utterly crush them, being careful to avoid leaving them wounded or humiliated , and retaining your initiative by maintaining the secrecy of your position. Bagging does all of this, and improves your odds of retaining your right to bear arms in the eyes of the law.