I agree that saying God is author of the Big Bang contradicts a lot of central Christian doctrines.
Like man being made in God’s image; the Fall; the introduction of death into the world; etc.
For example, if you say God took dust, made man in His image, and breathed the breath of life in him; that is a big contrast to: God made a big bang, over billions of years microbes became fish became mammals became apes became people.
We are hardly made in God’s image if we evolved from apes. As a matter of fact it is a shockingly gross insult of God to say so.
Only if "central Christian doctrines" purport that the Big Bang describes the sound they think creation made. However if it is (properly) interpreted as describing the suddenness and magnitude of creation there is nothing contradictory about it at all.
Thank you for your kind words. Unfortunately, Catholic and other liturgical chr*stians reject the historicity of the Biblical narrative of the first eleven chapters of Genesis out of hand because “that’s what the trailer trash believe.”