The Obama administration’s peculiar penchant for virtual responses to actual threats has yielded acute mockery of late, coupled with the suspicion that, beneath the White House’s defensive bluster and smart graphic design, there is much less to our 44th president than we are supposed to believe. The United States has a number of effective means by which it can deal with outfits such as Boko Haram, but one suspects that none of them involve photographs and social-media savvy. As a rule, the sort of people who are capable of abducting hundreds of teenage girls and threatening either to murder them...