Nah.  Merely pointing out you're rather 'selectively' informed.  And no, I don't believe your 'I'm not white' claim.  Too many from up in the melanistically-challenged section of the bleachers resort to that whenever they're challenged.  0% substantiation.

As for my so-called 'preconceptions' on race, I don't even recognize the biological validity of the concept with respect to human beings.  Because they're isn't any.  But my views aren't based on any kind of 'preconception' in any event.  They are based on experience.