Lt. Jonna Izzo explained it all to News 8: They have pent up energy from being scared in the movie theater and they come out and they dont know what to do with that energy.
They blamed Benghazi on a video too.
People (I use the term loosely) who are that severely lacking in self control, and who are that easily goaded into violent assault, have no place in civilized society. None whatsoever. The only solution is for their intended victims to stop them with gunfire, and for the police to get the XXXX out of the way when they do.