I am automatically suspicious of anyone who's a patriotic American. Either they're ignorant of our country's history and are idiots or they're proud of it and are psychopaths.
Edit: I just realized I'm paraphrasing Patrick O'Brien:
But you know as well as I, patriotism is a word; and one that generally comes to mean either my country, right or wrong, which is infamous, or my country is always right, which is imbecile.