Well, I am actually less interested in knowing how the very earliest Christians viewed them as I am the Christians of late Antiquity and the early Middle Ages, after they had become the dominant religious force in the Roman Empire but before the rise of Islam. I have at least a cursory understanding of how Christians of this era viewed Jews, European pagans, and, a little later, Muslims, and even how the different Christian denominations of this time viewed each other (for instance, Chalcedonians and Arians). But despite the long history of warfare between the Christians of the Eastern Roman Empire and the Zoroastrians of the Sassanian Empire, I know extremely little about how these two major monotheistic religions actually viewed one another. What was their relationship? Did Christians view Zoroastrians as simply heathens, or were their views a bit more complicated? How did these views compare and contrast with how they viewed Jews and Muslims?
To add an alternate history element, how might the relationship between these two faiths had evolved without the Muslim conquest of Persia? I offer two different scenarios...
1) The rise of Islam is entirely averted.
2) The early Muslim conquests still happen and are more or less as successful as they were in our world in the west, but the attempted conquest of Persia is largely a failure.
With Muslims as a perceived common enemy in the latter scenario, might Christians eventually develop a somewhat romanticized view of Zoroastrianism?
To add an alternate history element, how might the relationship between these two faiths had evolved without the Muslim conquest of Persia? I offer two different scenarios...
1) The rise of Islam is entirely averted.
2) The early Muslim conquests still happen and are more or less as successful as they were in our world in the west, but the attempted conquest of Persia is largely a failure.
With Muslims as a perceived common enemy in the latter scenario, might Christians eventually develop a somewhat romanticized view of Zoroastrianism?