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Islam built nothing, but plundered everything.
Christianity's civilisation was a reworking of the pre-existent Roman, infused with a new barbarian spirit that would doubtless have expressed itself in another, but equally impressive, way, had Christianity not happened to have won out in the late Empire.
As for the video, I find it embarrassing to watch clever atheists arguing against the stupider sort of Christian. Why don't they ask some proper theologian to come on the show? Might be worthwhile then.
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