Because everyone already knows that non-black lives matter.
...da Revrun Jerimiah Wright don't know. Neither do Al Sharpton, Jessee Jackson, Stacey Abrams, Sheila Jackson Lee dunno either. I would go so far to say that anyone who wants to vote the things you have worked for out of your pocket and into theirs don't know it either. That would include most if not all of the democrat party.
Liberals are like a "Slinky". Totally useless, but somehow ya can't help but smile when you see one tumble down a flight of stairs!