I will agree with his theory to a point.
He really needs to leave off that last part because you can't single out "young men trained on video slaughter games." That's playing right into the hands of liberal thought.
If he stops after "and watch what happens" he's made his point perfectly, and that also goes goes hand in hand with what the Bible says would happen in a society without Godly principles.
Should have stopped at young men. The common denominator in all these is it was a 20-something year old guys.