Khmer Rouge vs. Islamic State (IS) – which is more evil?

Two days ago, an elderly Cambodian father told the Khmer Rouge tribunal here – yes, it is still in existence – of how his son from the boy’s Vietnamese mother had been thrown in the air, then fatally impaled on a Khmer Rouge bayonet as he fell. That happened to other children, including girls.

Meanwhile, his wife and mother-in-law had their arms bound be…