Ok, so you don't "know" the religion is true, you acknowledge that religion likely has a naturalistic origin, you acknowledge that Joseph Smith likely simply wrote the BoM and didn't transcribe it from anywhere, you acknowledge that the religious texts aren't literal or even original in many cases, and you accept the scientific evidence (not the biblical account) or the origin of life, the universe, and everything in it.
I guess my question is, why use the label "mormon" on yourself? Isn't this classification which you have adopted merely a consequence of your cultural circumstance, and therefore inherently divisive for no real reason? Why not shed that label and simply be a "person" like everyone else, in stead of a "mormon?"