yeah, I take the warning

I normally have a strong resistance to paranoid-sounding, “the world is coming unglued” sorts of stories, but the following headline reflects one of my own recent worries:

“HOMELAND SECURITY WARNS OF GROWING RIGHT-WING EXTREMISM”

I think it was that Pittsburgh incident that really got me. Guy in a bulletproof vest argues with his mom, and when police show up he kills three of them?