Islam is still in the middle ages, and insanely jealous that Christians were able to claw their way out of it.
The Middle Ages were NOT the dark ages - the only period that could legitimately be called the dark ages in Western Europe was from 451 to 800 AD — 800 AD being the period of the Carolingian renaissance.
Eastern Europe namely the Roman Empire centered in Constantinople had no such fall until the 13th century.
Islam just ran out of dhimmis