It sure has. I grew up in a city which was at a racial simmer during the Detroit riots. Violence in our schools was an ongoing problem. In the early 1970's we experienced court-ordered busing to desegregate the schools. The racial tension in those schools was horrible. I was in middle school at the time, and I remember the rampaging 'youths' breaking windows, throwing furniture, and assaulting other students. Going to a school dance meant being taunted with racial slurs on the way into the building. Playing soccer in gym class meant being threatened with a beating if one defended the goal. Our poor choir director was pressured into teaching us a non-stop succession of Motown tunes. The demands for preferential treatment were constant, but I don't remember any gratitude being expressed for any of it. Instead white kids would periodically get attacked by groups of black kids and taunted or beaten up. Our possessions were stolen, and our time wasted in assemblies where we heard all about how we had to be more sensitive.
For many years I got away from the worst of this garbage by going to college and living in communities that had a more balanced composition. It galls me no end to see that my fellow citizens have idiotically put this same kind of vicious thuggery into power.
This black on white crime is nothing new at all. It has been going on for decades, but not everywhere. I've often observed that the biggest liberals include people who have never lived or worked in a place where this is going on, and who never had to fear for their own safety or even their peace of mind.