“Put simply, democracies run on one set of values (civility, tolerance, etc.), and fascist states run on another (violence, appeal to social frustration, etc). And we start to encounter real problems when democracies sacrifice their ideals and start trafficking in the violence that belongs to fascists. This idea gets crystallized by Sheri Berman, a poli sci professor at Columbia, when she writes at Vox:
[F]ascists embraced violence as a means and an end. Fascism was revolutionary: It aimed not to reform but to destroy the modern world — and for this, a constant and probably violent struggle would be necessary. Violence was not merely the method through which revolution would be accomplished; it was valuable in and of itself, providing supporters with powerful ‘bonding’ experiences and ‘cleansing’ the nation of its weaknesses and decadence.
Vox then adds to this thought: If we condemn Nazis for “their use of politically motivated violence and then turn around and punch someone in the face because he’s a Nazi — and bond over it online through memes and jokes — [it] seems hypocritical.” And it damages democracy.”

