The native tribes have a much more powerful culture then us. With them sharing a meal will prevent any fighting since it's a sacred act to them. For us only the land is truly sacred, everything else is up in the air. We don't really have any leverage in our culture that we can use to get the citizens in line.
I mean they have a origin story that believed peace to be the wishes of the Creater. We don't have that, which is part of the problem right now.
The law has to make up for our lack of a unifying culture that will keep the status que stable and mostly non violent.
In a way, I'm glad that you brought up the Haudenosaunee, although probably not for the reason that you brought it up.
Everything that ExtraHistory said in that video? Mostly true. It has its mythologizing, but as the Haudenosaunee teach it, that was how the Five Nation Confederacy (later Six Nations) came to be. The issue is that it glosses over the fact that the Haudenosaunee had a huge fixation on war. To be honest, they're closer to an unholy fusion of us and the Dead Priests.
The Haudenosaunee believed that the death of a close family member and the grief it caused could lead to insanity. Thus, it was considered necessary that such individuals needed to be replaced immediately or the grief otherwise expunged. This lead them to the concept of Mourning Wars. The Nation would declare a Mourning War and then all of their warriors would seek to raid, ambush, and attack another tribe in battle. The goal was to capture as many people as possible with the fewest possible casualties. Sometimes these Mourning Wars were called in the name of vengeance, in which case they would be straight up massacres, but they generally focused on kidnapping.
Once people had been captured, the stragglers and the sickly were quickly executed since they couldn't keep up with the rest of the group as they made their way back to Haudenosaunee territory. Once they finally returned, captives were often split up (often dividing families) among the various tribes and clans that participated in the raid. These clans would then decide the fate of their captives: white paint, red paint, or black paint.
Those painted with white paint would eventually be adopted into the tribe that had captured them. They were put on the fast track into assimilation within the tribe. Frequently, such captives were often forced to directly take on the role of the person that they were replacing, even to the extent of taking their name and place in the family. Women would be forced to become wives of recent widowers and men would be taken by recent widows. Beatings, starvation and other 'light' methods of convincing people to assimilate were often used. In this way, the Five Nations kept their numbers high and their physical and spiritual purity in tact.
People painted with red were conditionally adopted. They were frequently tested in ways that amounted to torture. Some accounts report having their finger nails ripped out, their hands crushed, arrows shoved lengthwise through the body, etc. If you screamed during these sessions, you were deemed unworthy and often executed immediately. Starvation was regularly mixed in as well. Once you'd managed to survive four years, you were generally considered to be a member of the tribe! Although, you would be the lowest possible person on the totem pole. French explorers frequently mistook the people in this category for slaves due to their wounds and the fact that they exclusively got the worst job in society.
Lastly, those painted black. They would be given one last fine meal and then ritualistically tortured to death in order to assuage the guilt and mourning felt by the family they were assigned to. People who were in the white and red category were also sometimes spontaneously tortured to death as well in response to the death of a close family member, but that was down to an individual family's choice, not a matter of course. Needless to say, substantially higher numbers of men were disposed of this way while women and children tended to be in the white category. I'm not really going to go into what occurred, but suffice to say that you can use your nightmares for inspiration.
Mourning Wars were the building block of Haudenosaunee culture. Recent anthropological evidence indicates that this type of kidnapping and bride stealing was one of the prime motivating factors for the 17th century Beaver Wars. The Beaver Wars were a period where the Haudenosaunee wiped out and assimilated virtually every tribe and nation in their immediate area. The only reason that their conquest didn't keep going was because they eventually conquered so much territory that they couldn't settle it, even with the people they had captured from enemy tribes. Even before that, the Haudenosaunee were known to constantly raid the Algonquin and Huron. The only thing the Great Law of Peace did was displace the raiding from an internal problem to one that they acted on externally.
Originally, I was going to make a point about how the Act of Empire is one that's inherently corrupting. Moral compromise is necessary, etc, etc. but I really can't. There was some parts of Haudenosaunee culture that was worthy of emulation, but their treatment of outsiders was certainly
not it. That Purity priest last update advocating a path of conquest and slavery where all foreigners are forced to live as Half-Exiles is what the Haudenosaunee did (plus some outright torture on top).
Now the more I think about it, I don't feel that the Act of Empire is corrupting. The people who engage in such acts were morally corrupt before they ever started. Every culture had problematic elements, even modern day ones. Trying to establish a relative moral is useless because everyone is wading through the muck. The only questions is if wading through the mud was truly necessary to get to your destination or if you're tracking it over a fine Persian rug.