If you are really curious about this all I can suggest is to read.
Read Bruce Feiler's books, especially
Abraham: A Journey to the Heart of Three Faiths and
Walking the Bible: A Journey by Land Through the Five Books of Moses
then read books by Stephen Hawkins nemesis (and my favorite Brooklyn plumber) Leonard Susskind,
The Cosmic Landscape: String Theory and the Illusion of Intelligent Design as well as Brian Greene's
The Elegant Universe: Superstrings, Hidden Dimensions, and the Quest for the Ultimate Theory
after that, then you can decide if God exists or not and we can have a discourse
as for billboards . . . . 1st amendment baby. this is the USA!
and then, of course, you have to read the Great American Novel
Bart