It definitely has to do with evil.....but when you trace where & what these people have been involved in.....I think there is much more than will ever known about what is REALLY behind the mass shootings & the training or use of those who end up involved. Yes they are responsible & should be held responsible for their evil actions BUT I think if we knew the whole truth behind ALL terrorist training there would be a lot more that would be held responsible than JUST the person(s) doing the shootings.