First, at least the laws of arithmetic have not yet been rejected by the politically correct. Thus, Cortes and the conquistadors battled the Aztec empire from 1519-1521. However, the events to be described in South America happened in 1450. Columbus only reached the Americas in 1492, so there was no chance that white racism caused this, or is there???
  https://www.naturalnews.com/2019-07-20-mass-grave-discovered-in-peru-children-animal-sacrifice.html
  https://www.dailymail.co.uk/sciencetech/article-6778541/Worlds-largest-mass-sacrifice-discovered-South-America-140-children-slaughtered.html

“The slaughter of hundreds of young children and llamas in 15th century Peru may have been in response to a huge El Nino. More than 140 boys and girls aged between five and 14 were slaughtered in what is thought to be a mass sacrifice to appease the gods of a now extinct religion. Many of the children and juvenile animals had their hearts cut out during the grisly ritual. It is thought a huge El Niño caused major flooding and storms which triggered the bloody sacrifice. Analysis of the remains of more than 200 juvenile llamas and humans dates it to approximately 1450, during the peak of the Chimu civilisation in northern coastal Peru. The Huanchaquito-Las Llamas burial site is a 7,500 square foot area located less than half a mile from the Chimu's capital Chan Chan, a UNESCO World Heritage site.

Its ancient empire controlled a 600-mile-long territory along the Pacific coast and interior valleys from the modern Peru-Ecuador border before the Incan empire took over. The study findings come after six years of excavation work at the site from 2011 to 2016. Study author John Verano, professor of anthropology at Tulane University, said: 'This site opens a new chapter on the practice of child sacrifice in the ancient world. 'This archaeological discovery was a surprise to all of us - we had not seen anything like this before, and there was no suggestion from ethnohistoric sources or historic accounts of child or camelid sacrifices being made on such a scale in northern coastal Peru.

'We were fortunate to be able to completely excavate the site and to have a multidisciplinary field and laboratory team to do the excavation and preliminary analysis of the material.' Anatomical and genetic tests, published in the journal PLOS One, says cuts across the children and llamas' sterna suggested they had their chests cut open to remove their hearts. Professor Prieto said: 'Accessing the heart by transverse sectioning of the sternum is a technique familiar to modern thoracic surgeons, and is known by various names. 'The purpose of opening the chests of the children can only be hypothesised, but heart removal is a likely motivation.' Human and animal sacrifices are known from a variety of ancient cultures and are often performed as part of funerary, architectural, or spiritual rituals.”

  https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0211691

     So, suppose that we had a fancy academic research grant, which always entails blaming Whites for everything bad; how do we incorporate the human sacrifice event into the White guilt history? Easy: just change the laws of physics, and causality! It is all just an average work day in deconstructive postmodernism! All this happened because of contemporary racism, nay, Donald Trump. The present caused the future, like something out of Dr Who. Wait, the magic of Google just revealed to me that academics, even physics geeks, take the idea of backwards causation, or retro-causation, seriously:
  https://en.wikipedia.org/wiki/Retrocausality
  https://plato.stanford.edu/entries/causation-backwards/

     Finally, a random bit about socialism decrying, destroying and everything else evil, that is  Western civilisation:
  https://www.washingtonexaminer.com/news/mcconnell-trump-on-to-something-when-he-suggests-far-left-trying-to-destroy-usa

“Senate Majority Leader Mitch McConnell indicated he agrees with President Trump’s assertion that progressive Democrats are determined to destroy the country and implement a socialist agenda. “You don’t have to have a military coup to have a socialist country,” McConnell warned Thursday morning during an appearance on Fox Business Network. “You know, they’re giving away free this, free that … who do you think is going to pay for that? All the rest of the productive parts of society. So the president is on to something here.” McConnell was commenting on Trump’s blistering attack on four freshman minority members of Congress during a campaign rally the night before, which he dubbed the “dangerous, militant hard Left.”

Chief Political Correspondent Byron York on the expanded Washington Examiner magazine. The four lawmakers, Reps. Alexandria Ocasio-Cortez of New York, Ilhan Omar of Minnesota, Rashida Tlaib of Michigan, and Ayanna Pressley of Massachusetts, have all advocated for liberal policies on healthcare, tax law, and immigration. They have attacked Trump and other leading Republicans personally, saying their policies are inequitable and racist. Ocasio-Cortez describes herself as a Democratic socialist. “Well, look [Trump] is right about the — the squad wanting to go turn us into a socialist country,” McConnell said.

  https://www.breitbart.com/politics/2019/07/20/marianne-williamson-asked-white-people-to-apologize-to-black-people-for-past-evils/