Why is it more logical to say that God has always existed? Surely if God could always exist without cause, the universe could too. The truth is, at face value there is no logical difference. If something can exist without a beginning then anything could exist without a beginning. Why should it only be one thing?
Fundamentally, theology and science cover two different areas of reality. Science ultimately explains the “how” things occur and theology is more about the “why”. This can be a confusing thought at first as it makes sense that if God created the universe, science should see evidence of “how” He did it. And we do see evidence of “how” the universe was created, from rates of expansion to background radiation, but none of this evidence seems to point directly to God. Atheists might say that this is a concern for Christians, but it really shouldn’t be.