Oh, I dunno. Hindus are no slouches in the mayhem department when the stars align. Vastly more tolerant than the Muslims though.
I’m not aware of any particular Buddhist propensity to riot. Setting oneself on fire is another matter ....
Then there were those samurais, Zen Buddhists, and the Ninjas were originally itinerant Buddhist monks. But that was organized bloodshed; assassinations, oppression of peasants, not rioting. Christians used to do a bit of violence, too. But they aren’t doing that lately, and neither are Buddhists, so why are the arty-farty crowd not picking on them? They’re a safe target, just like Jews and Christians.