Exactly, they understand their religion perfectly, just not it's history. It's like this Moroccan dude who was trying to tell me Averroes was a great muslim philosopher and one of the ways the lowly barbaric Europeans got a bit of Roman knowledge transferred to them. And I asked him you realize the only reason we know the works of Averroes is precisely because of Euro's conquering back the Spanish peninsula? All of his works were condemned as haram and he was pursued as a heretic. Why is he known only through his translations and not his original works? It's a bit like claiming Galileo as a christian intellectual. It's accurate but it doesn't tell the whole story. Don't even get me started on Avicenna.
There are differing opinions on the fading away of the Islamic golden age, most bringing up the Mongol invasions as the final death knell. I say the real culprit is the closing in of the muslim mind on itself, ironically exactly the same impulse driving the fanatics of today. Al-Ghazali is probably one of the most important figures in muslim history and one of the figure-heads of this movement, this ideal of returning to properly muslim values without the taint of godless kufr philosophies. The Incoherence of the Philosophers, a properly orwellian masterpiece of a title, and the Asharite philosophy it championed are like a list of reasons explaining how the Islamic world managed to stagnate intellectually for hundreds of years while the West surged ahead, despite Islam's relative headstart.
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