'Attack people because you are offended by proximity to them' is a card played by muslims everywhere and as often as they can get away with it. All the better if they can proxy in some local actor like these lowlife guards to take any heat on their behalf.

They were not held hostage to be forced to look at things they dislike, they were free to leave at any time, and were themselves probably offensive to the majority of the people there, even before the attacks on liberty. The special treatment they demand are always authority and powers to attack others.