Regarding R. Kelly and his acquittal...?

I just want to say that I have seen the tape many times and though there is a strong resemblance with R. and the man on the tape, I don't think it is him (look at the nose in particular). Initially, I DID think it was him. I support him and his wonderful music (his gospel album, "U Saved Me", got me through MANY hard times especially the military). Anyway, I just want to ask why do people who believe R. Kelly is guilty insist that he only got away because the alleged victim is African-American? I keep hearing that if the alleged victim were a "little white girl", that R. Kelly not only would have gone to jail but "under the jail." Wasn't Nicole Brown(?)-Smith, O.J. Simpson's wife, a beautiful, blonde Caucasian woman of status? Regardless if someone believes O.J. killed her or not, he was an African-American male and she was a gorgeous Caucasian female and O.J. walked when we all know that if "they" wanted him, they could have had him. Same w/ R. So why do ppl think R. Kelly "got away"?