In fact that's not at all certain. A secret government agency may well know the answer to the latter.
"god" and ETs are completely different. The former is a wholly baseless, ancient belief that has been waning as science and mankind progress. The latter is a modern idea, with ample evidence, that has been gaining acceptance under the same circumstances.
And that is pure guesswork as I said.......they are still both unknown.
"If the human brain were so simple that we could understand it, we would be so simple that we couldn't."