Black lives certainly do matter - that's one thing. But, it's just that in every profession, there are bad, as well as there are good. I think it's wrong to make cops - or any group - out to be the enemy based on a generalization. Stigmas and generalizations about groups are what get this world into such turmoil.
I couldn't be a police officer. It's a very difficult job to put your life in the face of danger for someone else, and that is extremely selfless. To now vilify cops is not really the way I think it should be looked at.
