Don't even try, you won't get a reasonable answer. I've had a discussion with a similar commenter here quite recently, and in the end, they ignored my arguments and still pretended that I admitted that "Europeans view Americans as suckers."

Even if you were to show them data, you could never convince them, as their position is based on emotions. And you can't argue someone out of a position using facts, if that person didn't arrive at that position using facts to begin with.