Not a joke, but probably impossible depending on what one means by destroying. I would be satisfied with expelling all muslims from all western nations and containing them in their own barbarian lands and hopefully, gradually civilizing them through trade and communications. But, no matter the strategy, islam must be defeated and many, many muslims will be killed in the process, far more than Westerners of course. But, then they don't really care since death is their greatest love in life.

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Qur'an:8:39 Fight them until all opposition ends and all submit to Allah.
Qur'an:8:67 It is not fitting for any prophet to have prisoners until he has made a great slaughter in the land.
Qur'an 8:12 I will terrorize the unbelievers...Strike off their heads and cut off each of their fingers and toes.
Qur'an 9:5 Fight and kill the disbelievers wherever you find them, take them captive, torture them, and lie in wait and ambush them using every stratagem of war.