The doctrines of the Trinity and Incarnation have, understandably, been a stumbling block to most Muslims who have only ever understood God as one in essence and person. While many assume this sort of absolute monotheism is the norm among monotheistic faiths, it actually has not been—modern Judaism and Islam are the only two faiths that emphasize absolute monotheism.
My upcoming series on monotheism is going to address these issues more in depth, but I will touch upon them a bit here and then get into what the Incarnation actually means.
Islam Meets Orthodoxy 