@Butrflynet,
Wackos do come in all ages..
It must be hard for security guards, even very well trained guards. They, like the rest of us, scan and presuppose, while being aware danger can come from the unlikely - and be at the ready, all the time they're on duty.
I feel for the guard, his family, and the guard community.
As for the hate in this act, I don't really have words.