My opinion:
1. Yes, people will be attracted to who they're attracted to.
2. Yes, those preferences are, in a way, shaped by society.
3. No, you can't make someone like who they don't like.
I think the problem here is ego. Society says "Hey, guys, white is beautiful. Everybody else? Eh, I guess you can aspire to be like us, but...you'll never be white." What we fail to realize is that minority children also have to grow up in this society, with "white is right" pushed into our face from a young age, so it's a losing battle from the get-go. Growing up gay, it's extra hard, because men have a habit of putting more emphasis on looks than women, so if society is telling white and minority children alike that white is the most beautiful, then obviously we're going to have a overwhelming number of both white and minority gay men who want "white only."
The problem lies not with white guys or minority guys, but with us all. We, as minority men, only want to feel wanted. That's all anyone in the world wants, is to feel wanted and to know they matter. With the white heirarchy, the chances of that are slim to none. So, basically--in my humble opinion, anyway--some minority men want white men to acknowledge their advantage and feel regret for the unfair system. White men, however, probably don't feel it's their fault and just want to live their lives and like who they like. "White guys don't like me" is not a problem typically experienced by the white gay population, so I have no doubt that many (not all, mind you) individuals don't really care about the issue. I've found in my 20+ years on this earth that people only care about a problem insofar as it affects them. We see it all the time with cancer patients who care nothing of cancer until they or a family member or friend are diagnosed with the disease, and then what happens? Cancer walks, donations, advocacy, etc. (No disrespect to cancer patients or their like.)
Simply put, arguing about this issue is a waste of time. Yes, it's unfair to minorities that white is seen as the most beautiful, but ultimately, we can only deal with ourselves and what we prefer. If someone doesn't want you, why on earth would you let yourself want them?
My two cents, anyway.