Racism Black kids

This one time a band camp I was polishing my flute when I seen out of the corner of my eye a bunch of black men started pushing around a chubby white boy named derek. Later derek was saying how black people are always so mean but I thought that was very racist because not all black people are that way. But then derek said why is it always the black kids pushing me around and I said it isn't just black people every body likes pushing you around.