I believe that pent up emotions and frustrations for a variety of reasons are just waiting for a reason to manifest themselves in violence. The loss of one's comfort level of national identity and arrogant intrusion into our collective house can be sufficient reason to sway the "fence sitters" in joining the hot bloods. Once it starts it will be self perpetuating open season for and on a multitude of real or perceived social ills. Violence has a tendency to feed on itself.