There is no doubt that racism exists, however I believe you misstate the objective of BlackLivesMatter, which is not combatting racism, rather combatting their perception of overt racism by the police resulting in the disproportionate killing of blacks by police.
Personally I question their conclusion.
Blacks are about 13% of the population but 25% of the victims of police shootings. On the surface, disproportionate.
Blacks are about 25% of the victims of police shootings, and commit about 25% of the crimes per FBI statistics. I would suggest that's not disproportionate, as police are more likely to come into contact with individuals, regardless of race, who are committing crimes.
Violent crimes might especially precipitate contact. Blacks are 13% of the population, yet commit about 50% of murders and robberies. That is disproportionate.
Personally regarding the two killings yesterday, which precipitated the demonstration, the one in Minnesota appears to be problematical, imo the one in Baton Rouge far less so, but in neither do I see any evidence of racism on the part of the officers involved.
Actually I think you misread my comment. It was the PASTORS and their churches who are trying to promote peaceful solutions and to keep their communities calm.
I made no statement regarding Black Lives Matter.