D'Souza vs. Ayers

I have viewed a couple debates between Dinesh D'Souza and Bill Ayers. http://www.youtube.com/watch?v=SqZQCCMmNnY and http://www.youtube.com/watch?v=XfVUktKzPSA. This is on the heels of D'Souza's movie America. D'Souza's premise is that the U. S. a good nation. We make mistakes, but most of the time we get it right. On the other hand, Ayers seems to believe that the U. S. is an evil empire.