The earliest parts of the Hebrew Bible were written around 1500 BCE and the last parts by around 100 CE, but the "medieval" era is much later, usually considered around 500-1400 CE. So a more accurate critique would be something like "such a bronze/iron age mindset."

Also, as a sociologist myself, I'm interested in the secularization thesis (i.e. "religion is dying") that was once the dominate framework for understanding religious expression. However, scholars have shifted in their understanding of the role of religion in modern societies around the world. I might recommend a review like this https://www.oxfordbibliographies.com/display/document/obo-9780199756384/obo-9780199756384-0073.xml