Well... one of the hardest things in this world is to make someone change its own views... nobody, NOBODY likes to be proven wrong, and most people will do anything to assure themselves that they are right and you (or anybody else) is wrong... so, most of time trying to make someone change its views is just a waste of time.
Just think this way: how hard would be to someone convince you that youre wrong about something you think youre right?