(Answer in English):
I also read that sermon by Mageson, however it has some things misunderstood and out of timeline, as well as many videos on the net....
The current literature and informative videos have the image of a quetzalcoatl called "Ce Acatl Topiltzin", and he was one of the most important kings and priests of quetzalcoatl, with the Spanish invasion they tried to associate the image of that king with "Jesus Christ" and that is why many Spanish interpretations painted him as a white man, the confusion comes from the term "quetzalcoatl", since he mainly used that name referred to as "Ce Acatl Topiltzin Quetzalcoatl" but only to imply that he was a priest dedicated to him, and he was a Mexican with Aztec royal ancestry free of infiltrators. ...
Ce Acatl Topiltzin was born in an era where there were already human sacrifices, and when he reached the age to be a king, he prohibited them and changed them for butterfly sacrifices, thus he made the city he ruled prosper, the story of him tells that the followers of Tezcatlipoca attacked him a lot even getting him drunk, after that he left to another area which many researchers theorize was to the Mayan civilization...
Some time later he returned to his kingdom, only to leave them prophecies and achieve his ascension to deity, since he dedicated his whole life to meditation and spiritual advancement.
That is why the king "Ce Acatl Topiltzin" is confused with "Quetzalcoatl", since he managed to ascend...
The human sacrifices in the Aztec empire were imposed by a man called "tlacaelel", he corrupted the term of the self-sacrifice of "the flowered wars" which were a fundamental part to become a Toltec, those wars consisted of reaching a self-understanding and mastery of meditation to enter the Toltec wisdom, however tlacaelel had no lineage of king but still climbed to rule and infiltrate all that corruption, thus began the Aztec sacrifices since he imposed them misinterpreting the true self-sacrifice, however the sacrifices already existed by followers of tezcatlipoca but were made official and mandatory by tlacaelel, tezcatlipoca is a deity but also refers to the confusion, that is why his name means "smoking mirror" the mirror represents the truth of existence; and the smoke the confusion that prevents to see the truth.
Having said and clarified the above, I must emphasize that it is still not known exactly who started the first sacrifice, however it is known that it was with the Toltecs, and the Toltecs were the wisest of Mexico, so the enemy attacked and corrupted them first ...
All the Mexican gods in a very ancient time were clean of corruptions, and with this it was known that the true sacrifice was to give life to meditation, if the god Quetzalcoatl remained clean of corruptions is because many kept the meaning of his name "feathered serpent" and this meaning represents the serpent kundalini.....
I plan to make a timeline in a good order so that the true history of Mexico and its gods is known.
I share with you this similarity of the representation of the god Quetzalcoatl and Thoth:
QUETZALCOATL (Here you can see how he has a mask with a duck face very similar to the Egyptian representation of Thoth):.
THOTH: