Since I have to lead you by the hand, one way you might start trying to establish causality is to take one of those horrible, horrible, incendiary comments like, "He could have been my son," and find some evidence that right after those comments, polling revealed a sharp increase in hostilities. Instead, what you give me is this moronic logic: because race relations have deteriorated while Obama was president, it must be that Obama himself is responsible for this. Mind you, this is after you yourself stated that neither you nor anyone you know is affected by what presidents say on an issue like this. How exactly do you know that others, in contrast to you, are prey to political rhetoric on race but you are not? What is your evidence?