AC, a couple points for you to consider:
1. Obama wasn't run by others for the nomination. He ran for it himself and got it.
2. There are any number of criticisms of Obama that *don't* have racial connotations. There's no racist undertone, for example, to saying that his years as a legislator (in Illinois and in Congress) were lacking in distinguishing achievement.
3. This theme of disrespect is a different matter. As I indicated in a link in my original post, black men were killed in this country not too long ago for allegedly "disrespecting" white women. Surely you can recognize that, even if you're not an Obama fan? And surely you can recognize that, for that reason, playing the "disrespect" card--in an ad whose claims have been called false by FactCheck.org--is incendiary?