Early visitors from the United States to New Mexico were almost exclusively from the United States South, especially the "Show Me State" of Missouri. This has had a very detrimental effect on New Mexican history written by the first folks from the United States who wrote about New Mexico and New Mexicans. Documents contemporary to the period are at fault as are documents and narratives written later about someone by other than the persons being depicted in the narrative.
The prejudice and outright racist views that most of the early visitors to New Mexico from the United States held is well known and well documented. This does not change the fact that this is where most folks get their information and where most folks establish their "first impressions".
That my friends is the problem......
The history books that have been written post 1970's are different and closer to the truth. I am talking here of legitimate history books, not the cowboy history some folks are still cranking out.