Really? I got kicked out of Christian Education in highschool for eating a bible and I’ve said “It’s in God’s hand’s now”. Admittedly as a humourous way to sum up “I’ve done what I can, now we see how it shaked out” but all the same.

It’s just an idiom. No doubt sometimes people literally mean it as handing off responsibility to a supernatural, interventionist entity but I would not assume that without seeing evidence someone was a fundie.