I don't think BLM is violent. I think individuals who may happen to also be partial to the movement are violent.
Until we see BLM coordinate attacks, condone attacks, or take credit for them like a terrorist group I'm not going to go down the path of classifying them as one.
It is just like throwing every Muslim into the ISIS movement.
I agree that they don't publicly condone the violence that we've seen. That being said, we've had two major events of police execution in the last two weeks. Police that had absolutely nothing to do with the events that spawned the protests (most likely, they are all on administrative leave until after the investigation). I would expect a movement that truly wanted to peacefully protest and get the word out about their cause, to not just issue an errant statement (if they have even) to show dissent over these actions. I would expect them to rally and have maybe a vigil for the lives of men murdered simply by going to work that day.......
I personally feel, that by their lack of actively condemning these acts (i.e. marching, and assembling against these acts of murder......hell, block an interstate or two....they would any other time...), that they may not condone them, but they really don't give a damn either....