Had quite a few in my home town.
Bombed the local FBI office, set the ROTC building afire, smashed
all the bank windows, battles with cops, tear gassed crowds, etc.
The rioting ended about 15 years ago. Since then, the town has
been peaceful, even during BLM protests.
Anti-war demonstrations? If that's what you're referring to, then some might have thought of them as "uprisings" as much as "riots." Some were even talking of "revolution" back then.