Aside from the fact that many Americans - and I'd guess a couple that post in here - would vote blankly for a white candidate against a black or other minority candidate - the difference is looking at how many black people have been elected President, and how many white people have been elected President. Being a part of history and backing the first really worthy black candidate for President is a pretty motivating factor for black people, I would think. And that makes this particular election different.
In no way are the two the same thing, and you know it. Not sure exactly how black people have kept white people from succeeding in this country as a matter of historical record, but I know for a fact that white people have prevented black people from succeeding for a large part of this country's history.
If you don't see the difference, I need to borrow YOUR blinders just to see what life looks like from that perspective. When you couple that with given perspectives on which party has a more understanding and welcoming view of minorities in this country, I'm not understanding how the 2% (if that's a real number, BTW) could feel very good about their vote. Unless of course, they are the 2% of the people who are in the upper half of one percent that the conservatives are so focused on helping in this country.