Christian destructive efforts - whether purely the action of mobs, or organized by Church leaders - against pagan temples, pagan learning, and pagan philosophers - is massively documented and undeniable. Whether one particular Churchman is to be blamed for the destruction of the Library, or not, is beside the point.
The Christian mob destroying the library is as real as Serbian rape camps or throwing out babies from incubators by Iraqis in Kuwait. And Muslim barbarians led by Omar (the real culprits) are as civilised as KLA thugs.