Original sentence: Another inherent difficulty in making a list of major religions is the problem of what to consider as a distinct religion versus what to consider as minor variants within the same basic religion.For example, Christianity and Islam are ordinarily considered separate religions, but they have much in common, historically and doctrinally; one could conceivably view them as two branches of the same religion
Edited sentence: Christianity and Islam are ordinarily considered separate religions as Muslims do not recognize Jesus Christ as the Lord and Savior of all mankind while Christians do.That would make it pretty clear that these two religions are not the same