The Roman/Byzantine empire was pretty much destroyed by Muslims, though. Its a but like thanking the Franks/Goths/etc. for preserving Roman cultural identity in Western Europe by preserving some of their texts..
> The Roman/Byzantine empire was pretty much destroyed by Muslims, though
This is hilariously untrue, if one is talking about the Western Roman empire. An islamic state did conquer Constantinople, which I presume is what you mean.
The Roman empire (western) basically fell apart due to infighting more than anything else.