As I understand it, Gates showed ID and cleared up that he was in hi own house... yet the cop still refused to apologize and get out. Instead, he arrested the man. He did co-operate enough to show his ID - it was the cop who did not.
Who said anything about conspiracy? It's a fact of life that the wealthy and powerful tend to get treated with kid gloves. Friends of cops get treated better, too. Even relations thereof. I've personally seen it happen again and again.
Generalizing about who has and hasn't been "well trained" to see x,y or z is quite frankly an ignorant assumption, one that puts your own ideology ahead of anyone else's experience. Maybe that's what you need to get you to rationalize some of the things wrong with our world. Hooray for you, but you'll have to forgive those of us who understand better.
At the end of the day, a man was treated poorly by police in his own home. Maybe he just happened to be black. But if something similar happened in rural white Montana (or anywhere else in Palin's alleged "real" America), every right-winger in the land would be howling. Their silence on this matter is quite telling, no matter how you toss the "claim victim-hood" diversion.