You should consider that you might be harboring some preconceptions about race.

I've considered that. I used to be a bleeding heart liberal as young adult. Then I got out in the real world and realized my idealistic view of black people -- among other things-- was fundamentally wrong. They lack empathy, impulse control, civility and basic common sense. I see this played out each an every day because they're all around me. So, no, I don't have a preconception. I have an evidence-based opinion from 20+ years of daily exposure.