There's actually three camps: protesters, protesters/rioters, rioters.
Protesters are non-violent demonstrating for change via their voice and presence.
Protesters/Rioters are demonstrating for change, but doing so through destruction and outfitting their wardrobe/living room as they feel that action, not voices, are what is needed.
Rioters are simply agents of chaos who break things and start fires and very often don't steal anything. Incite the situation, cause anarchy, leave the scene. Rinse and repeat.
Antifa's out there and white supremacists are as well as they hope this will start their long-theorized race war. Both groups are ones that have no business being around.
I hope you weren't implying antifa's were in some way hoping for any sort of war, much less a race war. At protests where you don't see white supremacists, antifa seems to be non-violent.