My dad might be RACIST???

i think my dad is a huge racist!! i go to a black school with a very little number of mexicans in there. i am mexican/puerto rican/white and respect african americans. my dads a stereotype! he thinks african americans LOVE sagging their pants to their knees and he likes making imitations of african americans and giving a bad example of them! he doesn't think he's racist, he say's ''he just doesnt like black people''. he's the most perfect dad you can ever have, but he a huge stereotype!! what do i do?