Black Lives Matter doesn't signify that black people don't care about others or that all lives matter don't matter. Black Lives Matter addresses the fact that unarmed black people are being killed disproportionately by law enforcement. Paraphrasing what someone else said: Responding to Black Lives Matter with 'all lives matter' is like responding to Save the Rainforest with Save ALL ecosystems. Doesn't make much strategic sense, does it?
Actually, that's not the case at all.
Blacks kill each other at a much higher rate than Whites or Hispanics. More than 59% of all the gun homicides in the USA are done by Blacks, despite them only being 13% of the population. Blacks are also much more likely to kill Whites than the other way around. More than 85% of all interracial violence is committed by Blacks against Whites. Yet no one ever mentions this.
So with these much higher crime rates, of course it will lead to Blacks being more exposed to a police presence...and this will lead to a much higher chance of Blacks being involved in fatal encounters with the Police. Blacks want to cry about roughly 150 Black people being killed by the Police, yet 7000 Blacks are being killed in homicides by other Blacks every single year. No one ever mentions this.
Even if you claim that Blacks are "targeted" by the Police, only 28% of all people killed by the cops are Black. The rest are White and Hispanic. But yet no one ever brings up this inconvenient statistic, because the SJW's and the Black Lives Matter group have a vested interest in making Blacks to be the victims when in fact they're not.