They're actually okay with double standards because they believe their side claims the exclusive moral right to violence: Repressive Tolerance.

Marcuse now turns to answering the question of what a Repressive Tolerance should look like, including what it must suppress and what it must tolerate, including the sorts of violence and extralegal behaviors it must tolerate. The statement, which we arrive at near the end of this part, is simple, in Marcuse’s own words: “Liberating tolerance, then, would mean intolerance against movements from the Right and toleration of movements from the Left.”