I love the answer theists say to the argument of the origins of God. No matter what you want to say created the universe; whether a deity or a bang bang, they both have to answer the same question. Where did the also come from? Theists say God created himself, he doesn't need a creator, or he always was and always will be or whatever the answer is but the same logic with the big bang. It created itself, it doesn't need a creator or whatever. They both have the same initial problem. So take it from a theistic aspect that God exists and created the big bang, okay? Now where did God come from? That still doesn't answer the origins of the deity
There is still the possibility, i don't think so, i don't believe that god exist's but i'm not going to vote no since i'm not 100% sure, i believe that the big bang did happen and that it created the universe we know but as long as we can't prove it Christians can use the card that "God might have been created after the big bang" or that "God made the big bang happen in the first place" so i don't vote just yet.
But then again the flying spaghetti monster or the invisible pink unicorn could have also done those things. ;)