My beliefs have nothing to do with any sort of "Christian" influence, while I do loosely consider myself to be one now (after a decade or so of atheism) my interpretation of things is completely non-traditional, & the majority of boomer "Christians" that I interact with would call me a heretic.

I don't think brain chemistry is some sort of fixed thing & people are not just their brain separate from everything else. I think the entire framing comes from a completely fallacious view of who & what we are. It's the same view that allows people to believe we will transcend our bodies & exist in computers or something, but I don't think that is how any of this works. I think this view mostly comes from people who are doing & promoting horrible things because they are afraid of their own mortality... which might actually have something to do with their rejection of spirituality or religion in some form or fashion.