They would have considered the Muslim victims to be apostates for their service to the occupying Infidels or to their client regime -- or apostates simply for acquiescing to that regime.
"Afghan forces arrest five men with 10,000kg explosives," from Reuters, April 21 (thanks to David):
Afghan security forces have detained five insurgents with 10,000kg (22,046lb) of explosives, an intelligence agency spokesman says.
The men – three Pakistani citizens and two Afghans – were said to be planning to use the explosives in multiple attacks in crowded areas. They were detained in the Afghan capital, Kabul.
"If this amount of explosives had been used, it could have caused large-scale bloodshed," said Nazari, a spokesman for the National Directorate of Security, who uses one name.