Yes, I am sure it plays a factor, giving people justification for their actions. The issue is that restoring order is not easy. And when the people making disorder are antagonistic to the people restoring order that clash leads to unfortunate scenarios. Lack of training (specifically direct experience of dealing with such behavior) or screening plays a role in how order is restored but these are reactive actions. In my mind everyone would be better off if we all maintained order so these clashes didn't have to happen in the first place.