If the BIG BANG theory can posit that all space/time and matter/energy can come into existence without having been created by something that existed "prior" to its creation, then why could not a God come into existence from a "vacuum" without Himself "being" a vaccuum?
Your phony BBT violates the First Law of Thermodynamics, which says Energy can neither be CREATED nor destroyed. The actual BBT relates only to the beginning of TIME not energy. The Energy that went "bang" has always existed and will always exist in the exact same quantity only its form can change. In science time exists ONLY in terms of motion, so the BB event horizon is the point where motion began.
How did energy "always" exist before there was "time." Always is a part of that whole "time" thing, dipshit.