OKRainbowKid asked if antifascism is an extreme movement.

xienze said that an organization which defines itself as antifascist COULD be extreme.

You're asking for a definition of terrorism so you can say that A/I is not a terrorist organization. But that's not what's being argued.

xienze is saying that antifascists CAN be terrorist, not that all of them are. For example, the Red Army Faction committed numerous terrorists acts: bombings, kidnappings, murders. https://en.wikipedia.org/wiki/Red_Army_Faction#Criminal_acts

OKRainbowKid, of course, started from a false premise that "antifascists" are being persecuted because they're against "fascism".