The Bush administration has failed to recognize that Al Qaeda is now a global Islamic insurgency, rather than a traditional terrorist organization, and so poses a much different threat than previously believed, says a senior counterterrorism official at the Central Intelligence Agency.Michael Scheuer, the former chief of the C.I.A.'s Osama bin Laden unit and the author of a best-selling book critical of the administration's handling of the fight against terrorism, said in an interview with The New York Times this weekend that the government "doesn't respect the threat" because most officials still regard Al Qaeda as a terrorist organization that can be defeated by arresting or killing its operatives one at a time.