I think he's referring to the polarization of America's parties, where there's now a sizable group on both sides who'd rather see the other side upset than their own side happy.
I don't think the extremists from either side will ever see the irony over fighting to keep liberty from one another.
Michio Kaku was right about human kind destroying itself. He just overestimated on the time it was take. It's not only the terrorist who don't want a type 1 civilization.
