Should the United States militarily defeat jihadist outfits in the Middle East? After 9/11 the answer seemed easy, but after the wars in Afghanistan and Iraq, Barack Obama is not alone in arguing that large-scale offensive campaigns against radical Muslim movements aren’t worth the cost. Even if the president’s go-slow approach is actually more likely to provoke more terrorism, is it the sensible policy for America? And can Western governments actually defeat the Muslim radicals who live in the West and are a nightmare for domestic intelligence services to find, let alone stop? These questions are as much about Europe as the Middle East.