BLM would be taken seriously if they would disavow the lies. Take Michael Brown, the gentle giant, for instance. Most BLM proponents still believe Hands Up/Don't Shoot, and choose to not believe the forensics. Forensics prove that every element of the initial story was a lie; that his hands were up, he was running away, etc. Not to mention his friend went on live TV and lied, then lied to the FBI and never got prosecuted.
The other issue is that if you look at FBI crime statistics, you'll see that there's a group that's responsible for a disproportionate amount of violent crime compared to other groups. When you commit violent crimes, police respond differently than if you didn't commit a violent crime. That will, in turn, result in more police shootings.
Sorry, the whole movement is BS.