Same source etc, but different religions ?

[Lek]

Christianity and judaism parted ways after Christ came because the jewish establishment wouldn't accept him as the anticipated messiah, but the first christians were jews. Prior to that they share the same history. I not all that familiar with the history of Islam, but I think Muhammad claimed to have direct revelation from God and believed that jews and christians had interpreted events incorrectly. Perhaps one of the muslim members can clarify this.