The French are now under attack by Muslims. The French should not have killed Joan De Arc, nor their last king. The best repentance is bring back Throne and Altar.
My impression is violence is a direct result of Islam. I do not think this is work place violence. That is I mean to say it is the result of a certain kind of social meme that gets incorporated inside a persons personality at a certain age. If the social meme is bad, it will result in bad deeds regardless of the inherent disposition of the person.
I have seen this a lot. People can start out with good or bad dispositions, but if they are taught an evil belief system, the belief system will take over.
Thus we see why learning Musar is very important. [Mediaeval Ethics]