I dunno, I think every culture has been hated for things a few do. Or for no reason, just because they are different. My ancestors came to the U.S. long before it was the U.S., seeking tolerance & acceptance, but they were hated too. Am I ashamed? No.
But I absolutely agree with Spondiferous. Our national history is more apparent now than ever before, and so much of it is so very shameful.