Black lives stop mattering to America after white people could no longer use us a free labor to build their wealth and empires. Rather than institute justice, they'd rather exterminate us so they can continue their tragic system of white supremacy.
It is a well known fact that white people all throughout history have raped, robbed and murdered indigenous people and stolen our lands. The issue is, the children of these criminals believe that they are not responsible because they didn't physically "do anything". Are they responsible for the rape, robbery, and murder of their fathers?
Between the intentional murders and deadly diseases brought by European colonizers, a large percentage off the indigenous populations in the Americas were killed. The death of over 55 million indigenous melanated people cooled the planet down.
After 400 years of Black Americans being under the worst forms of oppression the planet earth has ever seen, we still find ourselves under a tragic system of white supremacy that tries to kill us everyday, in every way.