The Russians have been cozying up with Muslims for decades. Why do you think the AK is the most common weapon in eastern Europe and the ME and the T-72 the most common tank?
Assad would have been deposed five years ago if not for Russian help and the Mullahs would have been tossed out on their asses in Iran decades ago if not for their support.
Russia has also been arming the Taliban for a decade in Afghanistan.
Learn something on the subject before pontificating.