I believe the Arab nations as we know them will cease to be an effective power within 50 years. Hopefully much much less in years.
There will be someday very soon a momentous discovery be it from man or alien that will give everybody complete easy non taxable cheap energy for cars and home, and oil, its feuds, its taxes and the engines it runs on will become obsolete.
Given Islam is about 700 years behind the rest of the world, science and technology are not about to grant us that much time for this Cauldron to cool off.
Even if the muzzies exterminated everyone on earth that didn't follow islam, they would then start killing each other because their different beliefs.
Islam is kept in check by force only.