Assuming, as you appear to do, that the problem is with "our system" and not something to be blamed on, you know, perhaps the perpetrators committing the violent crimes, I will leave the sociologists to answer that question.
The point, however, is the same.
What do you mean by blaming the perpetrators committing violent crimes? The psychological makeup of a criminal is very much dependent on the way they were brought up and their life experiences and interactions with the world. People of color also happen to be much more likely to grow up with no father, in poverty, with less education, and with greater distrust of the “establishment”. All of those demographics are also significantly over represented in violent crimes. Adjust for those greatly disproportionate numbers and you’ll find that they’re not disproportionately more likely to commit crime.
Now, back to the question: Why are they more likely to grow up with no father, less education, in poverty, and with greater distrust of establishment? Shouldn’t we be working on those as a way to counter these effects? Hence affirmative action, these protests, etc.