As an Asian American, I support AA, though I stand to gain little from it in higher education. In my experience (please don't take offense if this description does not apply to you), people who oppose AA do not really understand the difficulty of being a minority. The odds stacked against blacks, hispanics, and other disadvantaged groups is not slavery, or being put into reservations, or being trampled on by Europeans. No, it is the accumulation of generations and generations of oppression. When you grow up in a subculture that has seen nothing but discrimination, hate, violence, and poverty for the hundreds of years, all you know is misery and failure.
Most Asians who come to this country have it hard for a generation or two, but eventually things improve because back in the old country many did pretty well for themselves. Why isn't this the case for blacks? or native americans? or mexicans? Because they've never been able to do well, because some bastard from Europe was always making money from their sweat and blood. There is no history of success from which to build upon. There is such a thing as cultural momentum.
When you come from a middle class white family, you know what it takes to do well in this country. You may choose not to, but you know. A lot of ethnic kids don't. They see that their parents are working poor as was their parents before and so on and so forth. If that's all you know, of those are your only models from which you can make your life, how can anyone reasonably expect you to compete with white America? It is a remarkably willful person who work their way out of these circumstances, but most people aren't. That's why there's affirmative action. It's for those kids who may have done just as well as a white kid had their circumstances been different. Isn't that only fair?
What I resent the most are comments like: "Oh, he doesn't belong here. He only got in because of AA. His credentials aren't enough for admission." I find that to be very culturally insensitive. If you came from that kind of background, can YOU do better? Or will you end up a street thug?