Well first of all you only made 1 point in which I have responded to a couple times. Individuals acting outside of a groups purpose does not invalidate the groups purpose. You can take any group and find outliers.
As far as your individual examples ill address some of them.
#2 and #3: First of all I dont condone shooting or attacking police and neither does BLM. Anyone attacking or killing cops is acting on their own and hurting the BLM message. As far as these two stories go you might want to research them a little more.
http://www.snopes.com/black-lives-matter-protesters-chant-for-dead-cops-now-in-baton-rouge/
This video actually answers a couple of your assertions
https://www.youtube.com/watch?time_continue=291&v=gGQnJ8kXUko
One of the best points he makes is that BLM is not perfect but that many of the assertions about them misrepresent the movement and use incorrect information. He also points out that BLM is not 1 cohesive group that acts as 1. It has many different chapters that all act independently.
As far as a couple of those go they are fairly complex and I can have a discussion about them but it will take quite awhile to discuss them and their complexity. Especially 1 and 5. But to get there I would have to see where you are at with your understanding of some of the situations and how you feel about things again.
So again lets start with the basics. Do you think racism is happening on any wide scale level in this country? Is racism a problem in our society?
That is very very far from the truth. They are opposite. Maybe you should research a little more about both groups. And not just finding information to confirm what you think.