The similarities have been noted for hundreds of years, but in all likelihood Muhammad got his fatalistic/deterministic view of God from the same place John Calvin did: St. Augustine. Remember that the Koran was assembled using Christian and Jewish texts in the Arabian Peninsula where Christians and Jews had been living since at least the first century. Their kingdoms in the Arabian Peninsula were the high tech cultures and the builders of the first permanent cities while the Bedouins were still running around the deserts, periodically hiring themselves out as mercenaries both to the Romans and to the Persians. By the time Muhammad was to have had his first vision (610), St. Augustine’s works had already been around for over 180 years. And Muhammad tailored his initial messages to appeal to the Christians and Jews, both of whom rejected him, leading to the destruction of the Arabian Christian and Jewish kingdoms.
More likely the Moslem theologians behind the Koran got much of their beliefs from that tradition (which also has a full array of stories stemming from the days of Noah).
In fact, the Sumerians were the ones who had been wandering herdsmen when they built the first cities along the banks of the Euphrates, invented writing and most of the features of civilization.
Some say the term "arab" meant, in Sumerian, or maybe Dravidian, "thief" ~ it goes back that far.
Only I would use the little "g" god.
It is a regression: back to "the fates". At the mercy of a capricious god tossing dice to see who suffers eternally and who does not.
It's as if both Judaism and Christianity never happened.