I think you have been distracted
by shiny objects. Carson really does have a lot of important things to say about race relations. There is no doubt that he lived through many of the things others can only read about. Anyway, I think his Nazi reference was to the constant PC attacks leveled at him and others.
Your comments about Carson reminds me of this parody of a CNBC debate question I read somewhere:
"Do you support the recent 2-year budget agreement passed by both houses, and if not, why are you a racist?"
Seems like, you, the Democrats and obviously biased press has their reactions to ANY GOP candidate comment pre-programmed and filed away to be used without regard to what is said. The Carson=Kook meme is part of that*. Obama not only says, but believes, a lot of dumb things too; mostly having to do with US history.
*Yeah he has said some kooky things. But only shallow thinkers think that is all there is to him.