It seems more likely to do with the percentage of black and brown people.
Not really, it has to do with buying into the democrat/socialist/communist ideology of being entitled to something and feeling justified in using any means to get it.
We saw that historically with the confederacy's entitlement to slave labor, and with the kkk's entitlement to special privileges for whites. Both felt justified in using violence to get and keep what they thought they were entitled to.
We've also seen this with the slaughter of millions as a result of socialism and communism, again for the entitlement to something, in these cases of having a government that provides for you at the expense of everyone else.
Not to mention the millions of innocent babies who have been murdered before they were born for the entitlement of having free sex without accepting responsibility for the consequences.
What's going in in predominantly black and brown cities is only the latest, but not only, manifestation of this.