Talk politics.

Too many Americans worship the Founders as Gods on Earth, whose every word is as sacred as those of any religious text, and like every religious text ever written to be take only out of context, in order to assuage existing prejudices and ratify the foolish notions of the small mind. Good luck convincing those people that the Founders were merely human and actually designed a text that was badly flawed and failed within 100 years of its being written, while also including a means to change that text. They'll consider you a traitor for bringing it up even if you're not actually from the United States.