[farright]

You are interpreting "all lives matter" to mean this.

It could also mean that black people are not especially target by the police and that outrage at law enforcement is misplaced. For example we know that the rates of police violence against black people vs white people roughly mirrors arrest and conviction rates.

Now you might consider this incorrect, but I think it's a debate that has to be had in the open and not shut down by calling people racist.