Ronald D. Moore's another space epic, "For All Mankind" 2019- also matches the sentiment in the US now. What I really like is the attempt at hard-scifi. Many of the designs were in the drawing board once.
In Galactica a its near constant in the dialogue and its bad. They just repeat religious phrases without any substance and do it a lot. It's like everybody is an atheist playing religious role playing game. Just platitudes.
RDM managed to combine all aspects pretty well and it's shame that universe wasn't explored further. While there was Caprica series that took on pre-war Colonies, apparently it wasn't what people wanted to see.
I'm from Europe as well and I always find quite fascinating that setting. Colonials polytheism, Cylons monotheism, the mystic element of the Messengers Baltar and later Caprica Six saw; so the technology of that world felt unique yet close to real one. Tho, the octagonal themes on few occasions were way too silly, especially the 8-sided compact disks equivalents. Luckily there was no aliens like in the 80s series - Olmos' requirement for the role was that show wouldn't include these
Being overt about religion is uncommon, and most religious people are non-practicing.
Europe is just as varied as the U.S. in terms of attitudes towards religion. I don't think you can generalize either the entire continent or all the states.