Similar to many people who listen to climate alarmists, Adam Lanza’s mother was convinced that the US faces imminent doom. Children are taught in schools that their parents are destroying the planet, and that all life on the planet is doomed.
When children are taught that their parents are evil and that their life is hopeless, they are bound to act anti-socially. Some more than others.
It is time for climate nutcases (Al Gore, Bill McKibben, James Hansen, etc.) to stop their greedy, mindless fear-mongering.