[Porsche-O-Phile]

Unfortunately that conventional wisdom only works against people who value life over death. The next World War will likely involve a good portion of the Muslim world including a significant number of religious extremists that train for martyrdom and are convinced (to varying degrees) that death will bring them salvation. As such, the principles of fearsome weaponry and/or M.A.D. don't apply very well.

How do you fight an enemy that's not afraid to die and in fact looks forward to the opportunity?

Very tough question to answer.