As I understand, Sufism and fabricated Ahadith propagated by big Mullahs took hold of the Muslim elite and the masses by the 13th century CE.
This massive conspiracy relegated the life of this world to a carcass and its seeker to a dog. 'ILM = Knowledge was made to mean knowledge of religion alone. Science was treated as an infidel sport. As a result, action and progress gave way to empty rites and rituals and Muslim civilization came to a slow but sure halt.
In the meantime, Martin Luther and John Calvin heralded freedom of the Europeans from the Church. The Dark Ages soon ended and the scientific and industrial endeavor revolutionized Europe. When thought and action replaced apathy, the results are here for all of us to see.
Good & Evil continues side by side from the eminently Christian West while little good emanates from the Muslim countries.