We have a large population of Apache and Navajo in Arizona. Their view of this white man's holiday is quite different from that of the society that has systematically impoverished and deliberately exterminated their peoples and their cultures over these last 300 years.
I find the treatment of Native Americans often to be largely fictionalized by both sides. The mythos of Thanksgiving is based around kernel's of truth. There was a peace pact and a celebration of sorts. But this was in one area with one or two tribes and this occasion really only happened once. So the traditional aspect is grossly exaggerated. Other pacts between tribes and colonials were war pacts where the certain tribes sided with either the French, the English, or the Americans. It was an expedient for both sides.
Native Americans are often viewed homogeneously, as if belonging to one large group. The reality is that long before Europeans invaded foreign, tribes were as disparate and nuanced as any other tribe on earth. They damn sure didn't view one another as brothers but rather enemies... or in some cases, frenemies. The idealized "Noble Savage" narrative that's in touch with nature and passing the peace pipe is a Disney-fied version of history just as out of touch with historical reality as Thanksgiving is. Some tribes really were much more meek than others. Some, like the Comanches in particular, terrorized anyone not in their tribe -- whether colonials or other Native American tribes.
The barbarity of the Comanches, and some other tribes, were astonishing. And this wasn't consigned to only North America but also tribes in Central and South America reflect the same nature -- some being very meek and peaceful and others existing by brutality.
Long before the white man did N.A. tribes war with one another.
Having said that, no one can overlook how different settlers treated Natives. Some treated them well and wanted to live in harmony with them while many, many others brutalized them, used them, betrayed them in many instances and, while we're on the topic of savagery, also brutalized many different tribes to advance their view of Manifest Destiny.
My take on it is that, like it is with anything else, there's good people and there are bad people. They are mingled in with different races. There's no such thing as a benevolent race or a malevolent race. There's only good people and bad people and they are scattered throughout the earth.
Am I bothered by their eventual fate? Sure, how can you not be? Land was given back to them and there's not a single reservation flourishing anywhere in the United States. All of them are downtrodden.
I lived in Flagstaff for a few years ('04 - '06) and I met plenty of Navajo and Hopi peoples. I found that many didn't seem to want to dwell on the past but were much more interested in the future. I met others that looked at me with the coldest disdain imaginable because I was a representation of all that was wrong in their world.
Whatever the case, its incontestable that just as slavery was a scar on the American conscience, so too has been the fate of Natives.
"Reason obeys itself; and ignorance submits to whatever is dictated to it" -- Thomas Paine