You have been conditioned by daily rag propaganda, over reporting on non-white criminal activity.
The statistical correlation between knife crime and race is not an accurate social indicator. Expulsion from school (lack of education), age, poverty and exposure to domestic abuse are.
It's worth watching a considerable amount of interviews with Akala. He's even worth a follow on Twitter to add a bit if diversity and alternative thinking to your timeline (I'm also a huge fan of his music).
Ah so not about black lives matter then, you are saying it's about any social deprivation .