The majority of scientific and mathematical advancements from Islamic countries in the past mainly came from non-Muslim Greeks and Indians living there.
And what happend then?
If you consider, and with all respect, but during the crusades in the Holy Lands, the moslims where advanced in almost every way.
We learned about the medical and healthy methods, so that the wounded and the sick could recover, because of them.
Theyre beauty that they displayed in theyre city's
The intellect and knowledge.
All these things are gone.
Now you see misery, low educated people, and destruction, and the fact that they refuse to move on to a modern society