He fell for that “Three Great Abrahamic Religions” bullfeathers. The same guy who said that the koooran and the Bible are the same.
I stop reading when I hit BCE.
It is true that Islam was concocted from a tortured mish-mash of Judaism and Christianity, combined with a dash of moon worship and a massive dose of heavy handed theocracy.
Beyond that, it has nothing in common with either Christianity or Judaism.