They also saw their bodies as created by god, and thoughts/emotions as having metaphysical sources and consequences. Setting aside any specific doctrinal positions, the broader claims and beliefs of the church push one to think of themselves in some rather odd ways.
If certain thoughts and feelings are temptations from the devil, actually believing this explanation short circuits the systemic explanations for those thoughts/feelings, and leaves one to conclude that the body must not have anything to do with it.
I believe the Christian worldview involving a creator god more broadly points people in this direction not necessarily because of specific claims, but as a downstream effect of the broader philosophy.
> thoughts/emotions as having metaphysical sources
Maybe this is a Protestant or a reformed thing? Yes, the devil is a temptor, but pretty much every sect agrees that there is no way for man to redeem himself but through faith. It is our nature to sin, and thus we are perfectly capable of it without the devil's help.
But as a young child required to learn about how the world functions according to these ideas during the critical period of self-formation, such nuance was lost, and many foundational/implicit beliefs were formed and ingrained.
More broadly, I think it’s interesting to consider whether some of this is an unintentional side effect of the teachings, even if the texts technically communicate something else.
I know that for me personally, when I first encountered other schools of thought on the mind/body connection and my concept of my own self/body started to shift, all I could think is “holy shit, this is the opposite of what I was taught”.