If the action was intentionally done, then yeah, that's fucked up and the cop should be brought to justice. By intentionally, I mean that the cop intended to cause physical harm that was irreparable to the kid. And in that situation, BLM does have a point. If it was unintentionally done, then the cop really can't be blamed: the kid was out of line. That being said, there is no way to draw a conclusion, except to look at the body camera footage.

I think BLM would have a stronger point if they mainly targeted dirty cops: Most likely, Chauvin was a dirty cop because he worked at a club involved with trafficking women from Mexico and laundering counterfeit money. Unfortunately, they say "ACAB: All Cops Are Bastards". And that's never something I'd agree with. Cops are people too, and most are quite reasonable, kind, and fair. (That being said, they aren't your friend if you're being arrested, but that's obvious lol) And I say this as what the left would say, "A colored person....I mean Person of Color". Unfortunately, BLM is an extremist group that serves as a militant arm for the Dems, alongside money laundering for them as well. Their actions are not aligned with what they preach. And they should not be given any sort of mercy or compassion when dealt with by the law.

Edit: I'm not sure why u/_bryan is being downvoted, because he did bring up a good point and discussion.