@neologist,
This post by me is not directly about evolution, but word slipping.
Disbelief is a tricky word. Sounds immediately like opposition.
I saw it somewhere else today re theism, no link, I read too fast, will post it as an example if I run across that article.
As has been argued here by many over many years now - why do people never go see old threads? (maybe the early ones were never back tagged, but there were years of good threads) - not believing does not mean you believe there is no god or gods. It is an primarily an absence.
It can (what do they call them, hard atheists?); it also can signify the person knows about religion but has no very personal interest, not even hostility.. except to follow what is going on in the world.
When I left religion, it took me a while to traverse all that.
But back to evolution - I was raised as a very pious catholic. I was taught about evolution. It made sense to me. Back then, I believed in Aquinas's first cause.