I'm Irish, German, and French. Possibly Native American. My ancestors came over in the 1600's, yep, before we became a nation. As for the one who's family may have been Nazi's, you can't be ashamed of that. It wasn't YOU. My family, apparently, owned slaves at some point. Whereas I'm not PROUD of that, I certainly feel no shame. I simply feel sad at their ignorance. I do know that some relatives fought in the Civil War for the North, some fought in the American Rev. for both the colonies AND the Brits (my ancestors were the German "hit men" or the Hessians). We shouldn't be ashamed of something we have no control over.
Blessings.