8000 Muslims massacred by White, racist European non-Muslims. All Euro vs Euro

[WinterHold]

The Crusaders never managed to do anything remotely as brutal as this:

http://lostislamichistory.com/mongols/

A full week of pillage and destruction commenced. The Mongols showed no discretion, destroying mosques, hospitals, libraries, and palaces. The books from Baghdad’s libraries were thrown into the Tigris River in such quantities that the river ran black with the ink from the books. The world will never truly know the extent of what knowledge was lost forever when those books were thrown into the river or burned.

More important than the books, however, was the loss of life. It is estimated that between 200,000 and 1,000,000 people were butchered in that one week of destruction. Baghdad was left completely depopulated and uninhabitable. It would take centuries for Baghdad to regain any sort of prominence as an important city.

And Baghdad was not the only massacre.

I heard this horrifying piece of history before and just omg is all I can say. I wonder what books were lost during that massacre, until today Sunni Muslims blame Shiite Muslims for betraying Baghdad, even though and old event, it plays a key role in the sectarian civil war:

http://en.wikishia.net/view/Muhammad_b._...of_Baghdad

I wish to know what kind of impact would the lost knowledge have on the current advance of Muslims.
But I don't know if it makes sense to compare the duration of the crusades to the amount of destruction the mongols did.

Personally; I tend to believe more that a small damage over a very long period of time, might equal or even exceed a shorter great damage.