Why do most or all theater movies films mentioned the bible?

It's something many notice, but just ignore it.
I Google'd it one day and was surprise that not a single result mentioned it.

Notice:

Movies either mention quotes from the bible, mock Real Christianity or
give out information from the Bible.

Here are some examples.
Trailer 1: Limitless 2011
Quote: "I was blind but now i see."

Example 2: HereAfter 2010
A youtube video is shown of the right way to be saved. Actor rolls his eyes.

Example 3: Tron Legacy 2010
One of the trons grabs a Bible with a WTF look in his face.

Example 4: Piranha 3D 2010
Quote: "Your body is a temple, and now is the time to give thanks."

Example 5: The Tree of Life 2011
In the title.

Example 6: Scream 4 2011
Trailer: In the beginning. . .


There are many more like this out there.