You said it.

The overwhelming consensus is that you are born gay or predisposed to being gay due to genetic factors. While the nature versus nurture argument rages on, it seems doubtful that any majority of people would choose to be gay in a world where homophobia and fag bashings still exist. I would not call being gay a choice or a preference. It is an unshakable sexual orientation.

This other stuff -- who we like having sex with, Top or Bottom, etc. -- is all about choices and preferences. It is not the same thing as sexual orientation. It is influenced by environment, subjective experiences, prejudice, conditioning, and societal factors. Why try to white-wash it with denial or specious comparisons to sexual orientation?

Take responsibility for your choices. Acknowledge what you have no control over -- like being gay. You do have control over your sexual choices and your choice of partners.

If you don't like Black guys, there is a reason for it that has something to do with your perceptions of Black men. Period.