The argument that God cannot have always existed, or God could not have created himself, which defies logic could be argued in any theory. In The big bang theory, or whatever theory you believe, you must belive that either:
A. Something was created from nothing (God or rock)
or
B. Somthing has always existed (God or rock)
Many people like to bring up a law taught in thermal dynamics which states "mass cannot be created or destroyed" to some degree