My contention is that an actual army-sized intel-police addition of several hundred thousand in the US alone, and several hundred thousand more worldwide would get us up to a pretty high level of security and enforcement, even if not 100%.
From your experience, what do you think?
Is there any evidence at all that any government was complicit in these attacks?
It may well be that all we have suffered has been the result of private funding and recruitment, even if there are governments which applaud the attacks.
I would not support such action in the absence of such evidence, and by evidence i mean much better information than we used to justify the invasion of Iraq.
Bombing mosques would surely radicalize huge numbers of Muslims, whose private resources would probably be enough to fund further attacks, even if the terrorists did not get a dime from any government.
Killing every single person in Saudi Arabia would still leave a billion or so enraged Muslims, including a fifth column of several million in the Free World.