Obama Has Not Been Following Alinsky Tactics
One of Alinsky's best-known rules is “Pick a target freeze it,personalize it and polarize it.” He has not picked a target but has been going after a wide variety of enemies. “Pick a target” means first you convince the Consensus that Rush Limbaugh (or whoever) is insane and then you go after people you can associate with Rush using the Law of Sewage. Obama has been going after too many targets for that to work.
It's the same tactic that meant the U.S. did not fight Communists during World War II or Islamofascists during Cold War I. We had to pick our targets.