What upset the Americans about Britain's relationship with Aboriginal people?

Americans were upset about Britain's relationship with Aboriginal people primarily due to the British colonial policies that marginalized Indigenous populations and disregarded their rights and sovereignty. The colonization efforts often led to violent conflicts and the displacement of Aboriginal communities, which Americans viewed as a violation of moral and ethical principles. Additionally, the treatment of Aboriginal peoples highlighted the broader issues of Imperialism and exploitation, fueling discontent among those who valued liberty and justice. This discontent was further exacerbated by a growing sense of American identity that contrasted with British practices.