Even if theism is a failure, it's still superior to atheism

[Pat Mustard]

Not completely true. There is a LOT of mathematics and early science that was developed under Islamic regimes. The Bayt al Hikma was a center of learning for centuries before its destruction by Mongols (who were also not nearly as uncivilized as the stories say).

The problems arose when the fundamentalists took over. That is what destroyed anything good in Islamic intellectual culture.

The Mongols, who caused the World's population to decrease by 10%, and who slaughtered 100,000 human beings over the course of a single day can never be rehabilitated; they were monsters, in spite of their road building and communication infrastructure.

The Mongols were no different than any other warlike people in those days, except for they were more effective at conquest. And in some ways they were more restrained than other people, if you surrendered for example the would let you live and only impose a relatively minor tax. Contrast that with the behaviour of those who lead the first crusade or the Cathar ceusade.

And the Mongol conquest of Persia and the Central Asian steppe was precipitated by the sultan of Khwarezm murdering an embassy Chinngis sent without any provocation.