I live right in the middle of them ... and they routinely call black people niggers, threaten to kill Obama

I don't believe you, Bobert. Where is it you live? Not in any part of America I know of, if you're telling the truth, and I've been all over the country. Threatening to kill Obama (the President) is a federal crime (a felony per 18 USC § 871) and you should've (and from your post, I'm confident you would have) reported them, if it really happened.