They, obviously, are too busy organizing riots (known as "peaceful protests" today) to actually learn their history before they go bonkers on the rest of the USA.

Did black people own other black people??

Sure they did.

https://www.theroot.com/did-black-people-own-slaves-1790895436

So does todays BLM movement actually even know what they're opposed to in today's world?  I highly doubt it.  They'd rather be breaking windows, robbing and looting stores, shooting people who get in their way, and starting fires all across America.

Good showing for your peeps, bro.