When you take over land by squatting, you aren't "amending the law". You are amending land records using the judicial system. So I don't think the comparison ho

When you take over land by squatting, you aren't "amending the law". You are amending land records using the judicial system. So I don't think the comparison holds up. And considering that these Indian tribes have been fighting for their land since the beginning, it also doesn't really meet the criteria of someone squatting unnoticed on some land. If someone just started building on your land right now, and you filed a complaint and called the police and no one would come to help you remove them legally for a decade, they aren't going to eventually just get title to your land. Filing complaints and calling the police has disputed their claim.