The cause isn't "stop police violence", it's stop systemic racism within the police forces of the USA. Police violence disproportionally affecting black people is a symptom of that systemic racism.
*The usual trick is to claim police bias makes measuring violent crime impossible. But if one is not motivated to remain ignorant, there are a few ways to get bias-free statistics anyway. One is victim surveys, that don't involve the police at all. The other is using homicide as a gauge for other crime. Since it requires a dead body, and is mostly intra-racial, there's very little possibility or motivation to fudge these numbers.
> or their share of violent crime?
It's amusing how you think that American cops need any crime, let alone violent crime, in order to to exact violence and death upon citizens. You must be white.
And systematic racism is a symptom of the cruel bigotry and prejudice throughout society.
Anti racism campaigners are doing work for all of us who find our selves on the outside of the right side.
Edit: I do not live in the USA. I do not have an experience of racism there. I might be missing something
Consider this whenever you claim "someone" isn't doing something. They very well might be and you look stupid when you are shown otherwise.
I do agree that BLM made a mistake though--they should have called it "Black Lives Matter, Too". That would have made it clearer what they are going for.
That is what it means. To any body not either racist or on the autistic spectrum and very pedantic, it is obvious that is what it means.
The one reason is they, are not black.
If BLM wanted to add legitimacy to their cause, especially to those on the fence, they would raise awareness to these non-black deaths in the same way that they do when it's black deaths. Standing against unjustified police violence against any person is not at all against the "black lives matter" premise. In fact, speaking up about it would help people relate to their cause. But, for one reason or another, they seem to stay relatively silent.