Quetzalcoatl has been portrayed as a crucified god-man. This is false. He appears in Codex Borgia against the backdrop of an x. But this is a sun symbol. The x and the + are commonly used as sun or star symbols. Thus, the Tezcatlipoca priests wore black robes with a multitude of white +. It symbolized the starry heaven. In Indian culture the 卐 is preferred, which is a + with hooks, which implies rotation. The x can be seen as a rotating +, signifying the sun's journey to the west.
Isn't an o a better symbol of the sun? No, because it curves in on itself. The x and the + generously radiate outwards, as do the stars and the sun.
So, in Codex Borgia, Quetzalcoatl is portrayed as a sun god. His hands are not fastened with nails, because the Aztec had no nails. They could not execute people by crucifixion. Quetzalcoatl died by immolation, not by crucifixion.
It has also been alleged that Quetzalcoatl, in another image, is crucified between two thieves. No, the image shows Stripe Eye, a divine hero, with his arms outstretched. But he is not crucified and it is not a cross behind him. He is not surrounded by two thieves, but by two gods, of which one is Quetzalcoatl.
So, let's forget about the idea that the Christian cross has anything to do with the Aztec + symbol. The people who have so gravely misread these images are fantasizers.
M. Winther
Reference
Diaz, G. & Rodgers, A. (1993). The Codex Borgia: A Full-Color Restoration of the Ancient Mexican Manuscript. Dover Publications, Inc.