The Circle of Life.

Tribes in Ancient Mexico are confirmed as having been cannibals:

It was only the Xiximes and the like-minded Acaxées who are said to have been cannibals, though no archaeological evidence for the practice has been found for the Acaxées, said Punzo, of the Durango office of the Mexican National Institute of Anthropology and History (INAH).


"Through their rituals, cannibalism, and bone hoarding, they marked a clear boundary between an 'us' and 'them,'" Punzo said—"us" being the Acaxées and Xiximes, and "them" being everybody else.

The two groups fought and killed members of other groups, he said. But the Acaxées and Xiximes ate only their own kind, specifically men. Other native groups and Spanish colonizers were apparently ritually worthless, according to historical studies.

The sentence - "The two groups fought and killed members of other groups, he said. But the Acaxées and Xiximes ate only their own kind, specifically men" - is hopelessly tangled.  Did the Acaxees only eat Acaxees and the Xiximes only Xixemes? That seems odd, and a reason to defect to the other tribe.  Or is that Acaxees only ate Xiximes and vice versa, but the that the two groups are of one "kind" in the mind of the writer.  And how does "specifically men" fit into this formula?  Is "specifically men" a "kind"?