You frighten me because I think youre serious.
No, retarded kids with retarded parents in retarded society scares me! Totally serious about nigger, cartoons, belt. And probably serious about last two items. I know people who killed other people with axes or kitchen knifes (because firearms are effectively banned in my country) and now they are in prison. They all started as kids hitting other kids.
So have you ever attempted to befriend a black person? Human beings have a tendency to react to stimulus. Approaching someone with the preconception that they are niggers will, in all likelihood, elicit the response you expect.
Any violence against children is wrong and you cant rationalize it by claiming that it will eventually benefit the child. Period!
http://www.psy.miami.edu/faculty/dmessinger/c_c/rsrcs/rdgs/peers_social_general/margolin.exposure2violence.curdir.04.pdf