I've never understand that either, but I guess most people are deathly afraid of being labeled "Racist", and they have jobs to go to where they might get fired if they received such a label.
I think the culture has been so far degraded, people (white ones) don't know the difference. Urban, rap, thug culture is everywhere. Our degraded culture is supported by the nanny state, which is supported by massive debt in our fiat, unbacked currency. Its how you conduct long-term social engineering