I have read similar reports. The inability to learn and reason is across a broad spectrum, also in the inner cities in the USA and the world where IQs are dropping precipitously.
This does not bode well for the future, but it definitely serves a purpose to keep those in power, in power. If TPTB think they will have a biddable population of cheerful drones under their control, they are wrong.
I have no idea why they believe Islam is controllable.