In Star Trek it is never just God or an Angel, somebody is always playing a trick on some superstitious fool.
There's a reason for this. Gene Roddenberry didn't believe in religion. He was sure that by the time of Star Trek, humanity would have evolved beyond its need for religious belief. That's why gods and belief systems in his stories were always proven to be false.
In the BSG universe, religion is real. God is real. The nature of God is left a mystery (is the Cylon God a vast artificial intelligence, manipulating events throughout time to ensure its own creation?), but a mystery doesn't mean its false.