[tovej]

Would you please tell me one example where oppression has started with criticizing nazis.

[ranger_danger]

https://en.wikipedia.org/wiki/Red_Army_Faction

[tovej]

This is an armed resistance group, not an academic clique, and the violence was a reaction to attacks (e.g. beatings, assassination attempt).

It's also not an example of oppression, even though it is violent.