I wouldn’t jump to a conclusion as to who was behind this—seems about the type of thing one would do to provoke military intervention.
Protesters do half-heartedly distance themselves from this sort of behaviour, but this instance might warrant a louder gesture from their side. Sadly, they’re way too disorganised to bother (or even to be capable of) issuing such a statement over a mainstream channel.
Lack of organisation makes the whole movement accountable for actions of anyone wearing a black shirt, and thus is very easy to undermine, purposefully or accidentally.
