[Radar Chief]

Originally Posted by Cochise

Because they want to take a ton of people with them. They want to roam around like they are god or an action movie star, condemning people to death, and ending it on their terms. They don't want someone to put a stop to them as soon as they start firing. they want the media to focus on them and be famous. They can't cause a catastrophe if they draw in a police station and get whacked in 2 seconds

I think most of them feel their life is out of control and this is their ultimate attempt to exercise control over the world, for as long as it lasts.

Good way of putting it.