How about you find the source that says the Native Americans you're talking about worshipped the egg coming from the mouth of a serpent as being religious? Most of the so-called "Native Americans" share DNA links with the Far East and Middle East. This mound could be from the Far East tradition given the propensity of Asian haplogroups among the so-called Native Americans found in the area of this mound, but there is also a large collection of the Middle Eastern group X found in the region, as well. {See: "Mitochondrial DNA analysis of the Ohio Hopewell of the Hopewell Mound Group}, {See: "Migration and Social Structure among the Hopewell: Evidence from Ancient DNA")