What they say here, is not even close to what is at play, right? That is your claim, this is not correct and can't be trusted
"We know that police don’t keep us safe — and as long as we continue to pump money into our corrupt criminal justice system at the expense of housing, health, and education investments — we will never be truly safe."
https://blacklivesmatter.com/what-defunding-the-police-really-means/
Now pay attention to all of what she says. Of course it is politics, but behind that, if you follow, what she is saying, is psychology, sociology, criminal studies, economics and what not.
So you are argument is this. BLM can't be well read and rational, because they can't listen to and understand what the experts say. They(BLM) are biased and irrational and we all are. Well, that would then apply to you, me and the experts also.
So here is the solution. There is no solution, because we are all biased, irrational and we can't trust anybody, but you! You read one book and now you know!