I think twain is a lot like most of us disillusioned idealists who love Peter and Paul, but who feel a degree of revulsion for the general inhumanity of man. I don't think Twain exhibited any deep rooted prejudices of any particular strain of the human beast and his remarks concerning the French or the Irish or Comanches were adopted as part of a comic persona. Hell, I have no prejudices. I hate all races equally. I can't find one that is more base or greedy or downright ignorant than another.