Answer:
Judaism, Christianity, and Islam were both monotheistic religion because they worship only one GOd.
Islam began in Mecca in the 7th century AD, Christianity began in Judea 2000 years ago, Judaism began in Canaan Israel 3500 years ago.
Islam's God is Allah
Christian's Savior is Jesus
Judaism believs in Yahweh
They were both the 3 largest religion in the world.