Julia,

As I said to Olivia, it's important to understand that Native American tribes are all part of Taker culture at this point in history. They don't live their lives by the Leaver values they once harbored. That largely ended for Native American tribes by the beginning of the 20th C. Uncontacted tribes in South America are another matter, however.

Also, you wrote, "Who are we to judge?" I want to caution against this moral relativism. Moral relativism is the reason we turn a blind eye to clearly destructive practices in other cultures, believing we have no right to judge when a culture brutalizes women or denies certain groups of people an education. Turning the blind eye of moral relativism is what allows those cultural practices to continue, and thus, allows cultural abuse.