It's been around for 10,000 yrs. and the first slaves were white. It's evolved over time, but to crucify America for slavery is misguided.
http://newint.org/features/2001/08/05/history/
There's a thing called Zeigeist:
https://en.m.wikipedia.org/wiki/Zeitgeist
Yeah, we had slavery. It was wrong. But for the time that it happened, it was the way of the world. Many of the founding fathers, who had slaves, knew it wasn't right. George Washington was one. It's a part of our history. Why airbrush it away. Read about it, educate our young. So it won't happen again. You can't erase history. Ignore the noise.