Islam, Judaism, and Christianity supposedly originated from the same monotheistic faith, have the same forefathers, and have many of the same stories in their holy writings.
How they differ may be a better way to approach this question.
Briefly, the Muslim version of the story goes something like this: Islam and Judaism split from each other back in the time of Abraham.
This forefather of both faiths bore two sons: the first, Ishmael, with a servant named Hagar, and the second, Isaac, with his wife, Sarah.
Hagar and Ishmael were sent away from the family, and the Koran has it that Ishmael’s descendants are Muslims, whereas Isaac’s descendants are Jews.
Ishmael and Hagar are highly revered in Islam and are deeply ingrained in the stories of the religion.
Jesus came along thousands of years later and started Christianity.
The Christian faith has its foundation in Judaism. Islam, in turn, builds upon aspects of the earlier two faiths.
It doesn’t believe Jesus was God, but holds that he, along with Abraham, Moses, Noah, and Adam, was one of the five great prophets of god, or Allah.
The angel Gabriel plays an important role in all three faiths as well. Everyone knows Gabriel, the heavenly interpreter sent
to Daniel in the Old Testament scriptures.
Christians say he was the messenger who told Mary she was going to have the
Son of God.
Muslims say he was also the angel that delivered the Quran (Koran), the Muslim holy book, to the last prophet, Muhammad, in the seventh century.