system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are black Americans called African Americans and not just Americans?

Being British I just can't grasp this idea that black people in America are considered African Americans. Can't they just be Americans that happen to be black?
gpt
It's a "politically correct" term. It can be, ironically, offensive to non-Americans of African descent with darker skin or Americans with darker skin that do not consider themselves African at all. Generally speaking, you are just fine saying "Black" in America and few will be offended by it. Similarly, few get offended by "White".