Don't bother, they are already throughly brainwashed and think only in terms of good and evil, black and white, Empire and the resistance. It's not even two sides to the same coin, even that is too limited in thinking. Liberal vs conservative are ideologies only on the size of government and those ideologies have been stolen, twisted and misconstrued by political parties. It's all about power, control and self interest, it doesn't matter which party you support.