This isn't new. Many years ago, the city where I grew up had riots in the schools that coincided with forced de-segregation and busing between neighborhoods. It was shortly after the riots in Watts, Newark and Detroit in the late 1960's. During the worst of the upheaval in our community, it was generally known that there were 'troublemakers' from out of town stirring things up. They came from the nearest large urban centers. Back in those days the police chief could still say that publicly. I can't imagine that's true anymore.