Hruby's article is misleading in some respects, accurate in others. As portrayed in the movie, the Mayans of the early 16th century were in fact jungle dwellers whose great civilization had collapsed centuries earlier.
Hruby is correct in saying that there is no evidence of Mayans practicing human sacrifice on the same enormous scale as the Aztecs. That isn't saying much, however, since there is no doubt at all that the Mayans did practice it. The most famous example is the original form of the Mesoamerican game ulama, which included sacrifice of the entire losing team. Tlachti, the Aztec version of the game, did not involve sacrifice. Some of the remains of sacrifice victims recovered from the Mayan "cenotes" show evidence of unusually cruel and barbaric methods, notably "de-fleshing."
Academics like Hruby consistently mislead their students about this, as well as about cannibalism and ritual torture among native Americans, apparently in pursuit of some political agenda.
***Hruby is correct in saying that there is no evidence of Mayans practicing human sacrifice on the same enormous scale as the Aztecs.***
But they DID practice it. How much Human sacrifice is "not as much"?
Hard to say with absolute certainty what the Mayans did and did not do. Pretty thick jungle down there.
This is the same as saying there is no evidence that Pol Pot practiced genocide on the same enormous scale of Hitler. He's quibbling over magnitude. ;-)
Perhaps the fired Alabama coaches would feel better if they knew what happened to the fired Mayan coaches.