Earlier quoted context omitted.
You can call us just "Americans". The US is unnecessary, thank you.
[flagged]
Furthermore, both people from north and south america understand that american means a person from the USA. It doesn't refer to a person that may be from either one continent or the other. Also people don't call themselves western hemispherian or eastern hemispherian either.
What does African refer to? a person from Nigeria and Zimbabwe or also a person from Egypt or Algeria, or are they north-africans? Are algerian-americans african-americans?
Who is a 'new yorker', someone from manhattan, or new york city, or new york state?
Sometimes things are blurry.