I am not defending the Catholic Church, which he was baptized into BTW. In fact if you want to contend with it I may want to help. I contending the claim that faith in a personal creator God is Nonsense by pointing out some of history’s most sensible people believed in him. A list of sciences who's who reads like a Christian roster. There is no merit whatever in suggesting faith is irrational or unjustified. Catholic Church history is a whole other matter.
Why would it surprise you that in a society that was predominantly Christian, most people doing science (or proto-science, depending on the era) would be predominantly Christian as well... especially in cases where a person would be shut out of patronage and status - if not persecuted outright - if he didn't proclaim Christianity?
The vast majority of the history of European science was performed by white male Christians. If we've come to realize that their being white and male was only a matter of cultural factors that had nothing to do with their ability to do science, why would we assume the opposite for their Christianity?