One Supreme God (The Third Pillar)
In addition to pondering the transcendentals and the afterlife, the Nuhua also reflected seriously upon the existence of a one supreme divinity who dwelt in that place of transcendence, in xochitlalpan in tonacatlalpan.
While it is clear that the common Nahua worshipped pagan gods of a polytheistic pantheon, there also exists alongside this practice a belief in a larger, supreme force that unites everything under its umbrella. One of the names given to this “divinity” is Ometeotl (oh-meh-THE-otl), a singular god composed of opposing forces. This understanding of “god” was held and practiced by the high priests as well as the tlamatinime. (Joseph Julián González and Monique González, Guadalupe and the Flower World Prophecy: How God Prepared the Americas for Conversion Before the Lady Appeared [Manchester, N.H.: Sophia Institute Press, 2023], 96)
TLDR: Nuhua were pagans, but hey, they believed in a singular "divinity" of sorts, so that is obviously monotheism--same God in a way! (those familiar with the "quantifier shift fallacy" will note this [I have a mother; you have a mother; we have the same mother])