All violent protestors need to be arrested, charged, tried and punished if convicted. It's the only answer.
Post a link showing were the organization condones, supports and sponsors violence. Also, I'll forward your post to them in case they want to subpoena @Baron for your information in support of finding your identity in order to initiate a lawsuit.
No----No this doesn't show that the actual BLM organization is in support of this. https://blacklivesmatter.com/help-us-fight-disinformation/