And the smaller indigenous tribes in Mexico hated the Aztecs who conquered/ suppressed/ enslaved them.
A tzompantli or skull rack is a type of wooden rack or palisade documented in several Mesoamerican civilizations, which was used for the public display of human skulls, typically those of war captives or other sacrificial victims. It is a scaffold-like construction of poles on which heads and skulls were placed after holes had been made in them. Many have been documented throughout Mesoamerica, and range from the Epiclassic (ca. 600–900 CE) through early Post-Classic (ca. 900–1250 CE). In 2017 archeologists announced the discovery of the Huey Tzompantli, with more than 650 skulls, in the archeological zone of the Templo Mayor in Mexico City.
During the stay of Cortes' expedition in the Aztec capital Tenochtitlan (initially as guest-captives of the Emperor Moctezuma II, before the battle which would lead to the conquest), they reported a wooden tzompantli altar adorned with the skulls from recent sacrifices. Within the complex of the Templo Mayor itself, a relief in stucco depicted these sacrifices; the remains of this relief have survived and may now be seen in the ruins in the Zócalo of present-day Mexico City. 