The problem is creating such a thing.
Jews vs Christians is because both have different ideas of the Messiah and what he does.
Jews vs Muslims is because the Jews refuse to recognize Muhammed as a prophet
Christians vs Muslims is because Muslims have a different conception of God (Unitarian vs Trinitarian, Jesus as Prophet vs Jesus as Messiah)
I think the easiest way to make Christianity converge towards Islam and Judaism is an Arianist victory. I would't call the result "Christian", through.
Even then, in Arianism, Jesus is still a higher being, not just a man, and the Jewish idea of the Messiah is still different of the Arianist one.
Then there's Zoroastrism, which is very similar to Abrahamic religions in some ways.