I hope that it is as easy as you fear, because I don't have the slightest doubt that we're trying to put our folks into al-Qaida right now. No doubt whatsoever.
I can't think of a better way to defeat them than to infiltrate them.
Infiltrating has been the sticky point so far hasn't it? Hard for Joe Blow from Kansas to pass himself off as a Muslim dedicated to the jihad.
I sincerely hope that the Defense Language Institute is chock full of students learning Arabic right now (as well as Parsi or whatever else it is they speak). Had the chance to go to the DLI when I enlisted (after getting a good score on the DLAB test). Drill Seargent said I'd probably be learning Arabic (this was just before the Gulf War) and that dissuaded me from pursuing that particular avenue of training. I wish I had now, maybe I could be of some use.
I hope the CIA is on this thing. Surely, there has to be some hardball type Muslim out there that would be willing to take a lot of cash to crack the al Qaeda nut. I hope they find him because, as you say, a mole would be their undoing.
The problem with that is that morally, you don't want to commit an act of terrorism.
That's why they require you to do it, of course. They don't want Joe 6-Pack the ethical American CIA agent to infiltrate them, so they put the 'initiation' in to deter him by using his conscience against him.
So, if you grant the guy a pass to commit the required act, in hopes of a successful infiltration and averting much greater attacks in the future, the fact remains that your man committed an act of terror.
While this is an understandable neccesity under the circumstances, be prepared to be beaten with that fact once the information sees the light of day through a freedom of information release or from a lawyer or congressleaker privy to the information. Expect to see the antiwar, antiCIA, anti this or that folks use that one act against you, without regard to the big picture. Maybe they will associate an infiltrator's neccessary actions with big oil, the bilderbergers, or the Mickey Mouse Club. They will do so in vain at first, but over time people will come to be outraged at the smaller act, and ignore the terrible acts that were prevented because you had access to insider info.
If a loser like Padilla can get in, but the CIA can't, we ought to disband the CIA and build a new organization out of people who have a clue.