Final answer:
European settlers believed they were culturally superior, inadvertently decimating Native populations with diseases, leading to perceived justification for their treatment of Native Americans.
Explanation:
European settlers believed the treatment of Native Americans was justified due to various factors. First, Europeans perceived themselves as culturally and biologically superior, leading to a sense of entitlement over indigenous lands and resources. Second, the spread of contagious diseases unintentionally decimated Native populations, reinforcing the idea of European dominance. Third, conflicts arose from differing social structures and misunderstandings between European and Native American societies, justifying European actions in their eyes.
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