ONE of the most troubling tics of Team Obama is the frantic rush to de clare that every terror attack on American soil is carried out by an isolated individual with no connection to al Qaeda or other groups. It was the gist of their rapid response to the failed airline bombing on Christmas Day, to the Fort Hood shooter and, most recently, to the plot by Faisal Shahzad to set off a car bomb in Times Square. On the surface, the aim is obvious: to minimize the fear that radical Islamic organizations have penetrated homeland defenses. The working assumption...