He’s not talking preemptive strike, just a preemptive threat to retaliate after the next attack as a means of deterrence. Which brings us to the “absolutely crazy” part: Why does he think it’d deter them? The backlash from a strike on Mecca might well swing most of the Muslim world firmly behind jihadism. If anything, the “threat” is an inducement.
Now, let’s see if even 5% of our commenters agree with me.
Update: Even a stopped amateurish webzine is right twice a day.