https://mastxeducationdotcom.files.wordpress.com/2015/12/ruben-cortezs-ad-hoc-committe-final-report.pdf

The PDF itself is actually very good social science but the takedowns of the book itself, i'll post a couple of my favorites and just let you decide for yourself.

“Massacre was an effective strategy because the victor gained complete possession of the vanquished tribe’s land. Sometimes there was ceremonial beheading, scalping, or partial cannibalism. A common North American Indian practice was beating the dead, with the highest honor given to the warrior who struck the first blow. If massacre was not the objective, captives might be taken to be ransomed if the tribe had economic needs or taken as prisoners of war if the tribe was depopulated. It was common for wives to be kept as concubines and children to be kept as slaves and adoptees of the victorious tribe. Some tribes in the Pacific Northwest such as the Haida were even feared as habitual slaveraiders

or

“Stereotypically, Mexicans were viewed as lazy compared to European or American workers. Industrialists were very driven, competitive men who were always on the clock and continually concerned about efficiency. They were used to their workers putting in a full day’s work, quietly and obediently, and respecting rules, authority, and property. In contrast, Mexican laborers were not reared to put in a full day’s work so vigorously. There was a cultural attitude of “mañana,” or “tomorrow,” when it came to high-gear production. It was also traditional to skip work on Mondays, and drinking on the job could be a problem. The result was that Mexican laborers were seen as inferior and kept in low-paying, unskilled jobs that did not provide a pathway upward