My wife is a naturalized citizen (from South Africa) and thinks this guy is GREAT!
If you had told me ten years ago that a Russian programmer would be working in the cube across from me I'd have told you that you were nuts. But he's there and man is he ready to smash anyone that talks poorly about the U.S.
We had to calm him down a few weeks ago when our token office lib made some derogatory comments about the flag.