Christianity emerged from the religion of Israel. Or rather, it has as its background a persistent strain in that religion. To that strain Christians have looked back, and rightly, as the preparation in history for their faith.
From a writing point of view, you now have teams of screenwriters working with a director. What's lost in the process is the power of that one heart, brain, gut and soul that makes something an original piece of writing.
My grandmother had the most dramatic effect on my life because she set me in one direction, and I had to go back the other direction for my sanity, and for my ability to be a social human being.