Mark Steyn writes:

Question: what do the 9/11 killers, the Shoebomber, the Heathrow plotters, the Pantybomber, the London Tube bombers, the doctors who drove a flaming SUV through the concourse of Glasgow Airport and the would-be killers of Danish cartoonists all have in common? Answer: they’re Muslim. Sometimes they’re Muslims with box cutters, sometimes they’re Muslims with flaming shoes, sometimes they’re Muslims with liquids and gels, sometimes they’re Muslims with fully loaded underwear. But the Muslim bit is a constant. What we used to call a fact.