I would love to be able to say that the damage was caused by alt-right types who insinuated themselves into the protestors, to make the Protestors and BLM look bad. But, I have no evidence of that.
Where there's smoke...
Infiltration and incitement of anti-establishment groups across the political spectrum by all tiers of law enforcement is common. Presuming that out-of-character acts of violence are incited or carried out by state actors should be the default assumption.
So, you're blaming the US Government for this?