I think Carl Sagan had an excellent approach to this idea.
If we decided that God created the Universe, then we must–of course–ask the next question: Where did God come from?
If we decided that this is an unanswerable question, then let us skip a step and say that the origin of the Universe is an unanswerable question.
Or, maybe if we decide that God has always existed . . . then we should skip a step and say that the Universe has always existed.