Crazy? or part of the culture?

It summer and time for dancin' in the street.

But, as we can already see, the summer not only rots my brain but it begins to bring out the best and worst in people. Lots of people are out in the streets and lots of things happen. Some of the heat seems to get into the brains of some folks and drives them over the line.

Here is a list of some people who have made the news for shooting people.  You task is determine who among these folks are crazy, who are just part of the culture, and who is just bad guys:

James Holmes, who killed 12 and shot 70 in Aurora CO movie theater.

Michale Slager, who shot a man who was running away from him after a traffic stop in South Carolina

Whoever it was who shot and killed a 16 year-old boy who was riding his bike on a Boston Street yesterday.

Jihad John, the ISIL guy who is in the video executing people.

George Zimmerman, who shot and killed Travon Martin while "standing his ground," but who was NOT arrested in Ferguson,Mo.

Are they crazy? Some and not others?
Are we all crazy?
or is it only me?

Anyway, summer is here.  Use sunscreen. Have fun.