Your ideological defence of passed-by exploitation systems cynically twisting a great ethical religious for base political purposes will be proven wrong when the Persian proletariat realizes how deeply deluded have they been for all these centuries by their own elites. Mazdak already knew that before Islam, and his followers have kept that flame alive in the century long-hardships of exile and struggle against the arrogant Khagans.
Muhammad again brought a light in the Southwestern Asia. Persian and Roman imperialists managed to keep that danger to their domination off, but that was not enough. Sharif Mbarashe discovered the laws of economic and social development and the revolution through the study of Islam applied his discovery in the really dis-alienated way of life the Socialist Alliance is creating in Northeastern Asia. Many Muslims and others are prepared to join our journey to true human progress, equality and freedom. Many nation like Rome and Tavatinsuyo, while keeping injustices supported by ideological backwariness and cynical self-interest, structurally show how much Socialism is needed to the current development of productive force, since they adopt a great deal of its organizational principles.
We are indeed no more than a small vanguard of what will necessarily happen in the rest of the World. Laissez-faire economy is still good for places like the Maori Emirates, and I know ho proud the Vinlanders are of their free initiative thing, though to my mind, it is really closer to cooperative socialism than to the big corporate exploitation we saw under the old Jakut tyrants.
More to the topic, it is probably lucky that Islam kept enough of its pristine purity, a feat that hardly would have been possible in the event of a great conquest overland. I can see most of the Persian nobility converting, while keeping its old values of birthrights and so on, and insuffating them into Islam.
OOC: Sorry if I'm derailing to much, I'm having fun with this.