It was muslim murder, rape, enslavement, and pillage that brought the so called muslim golden age. A golden era made possible by the capture of Christian lands and Greek knowledge. Byzantium became the new Rome by the design of emperor Constantine as the Roman world became vulnerable through its own rot. Western and Northern Europe were always backwaters in the Roman world; the important areas were North Africa and Asia Minor. Western and Northern Europe were not so much devastated as they were never important. Many years passed as Western Civilization developed. Persia with its wealth and knowledge was captured only after ruious wars with Byzantium made both vulnerable to attack. However, the Dark Ages, a time of societal consolidation, did pass.
Unfortunately, muslims continue to live in the Dark Ages, worshiping evil including rocks in mecca and a primitive society espousing a death cult complete with slavery and misogeny. Muslim arab lands have the least productive people on earth. The low productive may only be genetic, a result of serious inbreed and goat heading. So, why won't the Arabs in Mecca leave the Dark Ages?
Yes, rapine and pillage ~ those were staple ingredients back then.
After that it was just one Turk after another until WWI. The Arabs obtained substantial liberty from the Allies who won that war.
They are, as it were, into their first 100 years of recovery after a nearly 1000 year long enslavement by a foreign power.
I supposed they might be excused for some degree of their screwups ~