Well the Christian Knights of the Klu Klux Klan lynched someone for being black a few years ago, and many thousands before that. Christians have slaughtered and enslaved every people they came in contact with.
Five million were burnt at the stake in Europe, then a lot more died in the near endless religious wars starting with the Crusades. Then came centuries of Catholic-Protestant wars, and religious ethnic cleansings. Silcian Vespers, Albaginseians, the day when after being blessed by the priests the Catholics went forth and slaughtered every Protestant man, woman, and child in France. In the last, Hitler went after everyone who was not Catholic or mainstream Protestant, Jews, Gypsies, Seventh Day Adventists, Jehovas Witnesses, Christian Scientist, Communists.
The first to America were fleeing religious oppression. Quakers, Mennonites, Amish, Brethern, Shakers, and many more. It followed. The last witches burned at the stake were in the early eighteen hundreds, in England, maybe Scotland. In Salem they hung them. The Trail of Tears was a death march, Sand Creek, Wounded Knee, Chief Joseph's War. A bounty on the scalps of women and children?
It sounds like human sacrifice to me.
Aspurger culled the high functioning from the dammed, they might make WunderWaffen for the Herrenvolk.
The lower functioning vanished. Mengala saved some twins. The woman doing a study on Gypsie children who when she was done, had them marked for immediate termination, so they would not corrupt her new material from the camps. The Medical Profession working for the best interests of the State in the name of Science.
The Mayans did practice ritual blood letting on themselves, I know of no human sacrifice. The Aztec did. The Mayans fell apart 600 years before the Aztec rose. The Aztec sacraficed captives taken in war. Then the people ate them. Their diet was short on iron, and protien. The were inimic, and had cravings. Human flesh provides both. The Flower Wars were for the purpose of taking live captives, who's hearts were given to the sun and their body to the people. It was Communion, and a Feast Day. It was mutual, other tribes ate Aztec captives.
It was the only thing that met their nutritional needs. For those who could afford it, children were raised and fattened for market, they were roasted whole. The magic was in the blood. It worked, it cured them of a dietary deficency. Suddenly they felt strong and alive. They thought Christians strange for they did not eat the people they killed.
The problem was living on corn and beans, and way too many people. They did not have many domestic animals, the turkey. Incas ate Guinea Pigs, it worked. The Spanish cooked their food in iron pots. The iron allowed them to better process oxygen, they could move much faster and longer than the Native Americans. They had body armor, steel weapons, and were like they lived on speed and PCP.
Cure=Final Solution=Manifest Destiny, just words.