The whole God concept in one piece seem oda has critical view on gods and religion. Skypedia has angel girl say it is not time to pray.
Like luffy has critical on elbaf God to giants at little garden, if gold tell you die, will you do it.
I know oda has reference to heaven. He seem non religous guy.
On volume 1, he did have alien face as photo. So ofa mind think aliens are mistaken gods.