Islam does not build. It only destroys.
It can feed off the body of a civilization it has conquered for about 2 generations, and then that civilization sinks and disappears and we are left with howling mobs of brutal, ignorant, non-working men waving their fannies in the air for insane, power-crazed preachers of an insane cult.
Persia is a text book case of this. Before Islam, it has one of the greatest civilizations in the world. After that, it was just another sandbox country.
Granted, it did progress into modernity for a season under the Shah and other rulers, but only because they practiced a softer modernized version of Islam.