A year or so before the intervention in Iraq, one of the president’s men told me that the plan then was to invade the country with two US Army brigades (10,000 men) and rely on a local uprising to do the rest of the job.
Arnaud de Borchgrave is a sensible, worldly man, knowlegeable in military matters. He is right to be sceptical about this "plan."
Nothing is ever simple in war. Weapons systems never function perfectly as designed. Weather, fear, the opposition, etc. all create a situation in which many, many variable are in play in any combat operation.
Two B-2 bombers? They would be the first of many, many sorties.