Technically, black lives don't matter but neither do white lives. There is no such thing as a "black" or "white" person. We are all homo sapiens. "Race" is nothing more than a cultural category--a social construct to use liberal terminology. "Ethnicity" such as "black" or "white" refers to self-identifying groups based on beliefs concerning shared culture, ancestry and history. But it's bullshit. Anybody who has ever taken a DNA test will show that your culture and ancestry is very mixed. An Asian born in America has very little in common with an Asian in China, for example. We are all homo sapien mutts. No life matters unless we choose to make it matter.