Why are people so racist?

I lived in mississippi all my life racism still exists white people try to act like there so high up the police only pull the black people over harring us like we've did somthing just because we have nice cars that doesnt mean we're selling dope .malcolm x once said those uncle tom negroes in washington dc are doing nothing for the black people but taking our vote.im not a racist im just sick and im tired white people thinking that there the superior race.ps fox news is the racist channel of them all