far more likely to be murdered

Let's just pretend for a second that you could actually back up any of the above claims with actual facts and statistics. Let's pretend.

And who is far more likely to murder them?

Anyway. Yes, saying "black lives matter" implies that there is some objection to this somewhere. A straw man. No one ever said black lives don't matter. No one is killing blacks at a faster rate than anyone else, aside from other blacks. If a black is killed by a white cop, it is a national headline. If a white is killed by a black, it would be racist to even have it on the back page of the news, because then we're picking on the blacks.

Saying "black lives matters" stirs up conflict that was never there to begin with by implying that someone said "black lives don't matter", first. But if anyone were to say "white lives matter", even in the context of the lack of reporting on white deaths at the hands of other races, then you are automatically a Nazi.

Here is a hint: You are either being manipulated by a third party (try to figure out who controls the media which guides society), or you are a part of that third party yourself and are trying to manipulate others.

EDIT: Futhermore. The more conflict there is between whites and blacks, the less either notice who is really enslaving both.