This doesn't directly answer your question of "violent" (and it seems on the whole the QAnon protests have been non-violent), but the FBI assessed QAnon Extremi

This doesn't directly answer your question of "violent" (and it seems on the whole the QAnon protests have been non-violent), but the FBI assessed QAnon Extremists as a domestic terrorism threat[0]. (The qualification here is "QAnon Extremists" which appears to, probably correctly, separate the extremist element from the majority). [0]: https://en.wikipedia.org/wiki/QAnon#FBI_domestic_terrorism_assessment https://en.wikipedia.org/wiki/QAnon#FBI_domestic_terrorism_a...