What major world power, either past or present, should the US emulate?
It's all relative. Should we follow the Roman Empire's example? Or maybe the Soviet Union's? Or Nazi Germany's? Or Napoleonic France? Or the British Empire?
People who complain that the US record on human rights isn't perfect always seem to be comparing it to some imaginary Utopian society. And even then, we wouldn't agree on what exactly is a human right. I consider gun ownership a human right for instance. I consider the government eliminating from society murderers and rapists via capital punishment a human right. Obviously someone like E. Macy would disagree.
But he'll have to excuse us if we're not convinced that his views are universal views. The US is a democracy. The rights we have are the ones we choose to grant ourselves.