What's Wrong With this World??

So I hear today that an elderly man opens fire, with a shotgun, in the holocaust museum killing one of the security guards. I just don't understand peoples thinking, instead of ruining peoples lives because they have a problem, why don't they just off themselves and save the rest of society from having to suffer. What did this guy proved, other than his stupidity and almost getting killed. This wasn't a protest, or a rally, no this guy woke up and decided this was the day he was going to walk into and Federal building and open fire on innocent people just because he had a problem with Jews. Unbelievable.