Originally Answered: How should I correctly claim my ethnicity?
The Native Americans dispute the claim that they came from Siberia.
If you have done any research at all, you know that some people from Africa sailed to South America; Chinese sailors landed on the coast of California, and all the way up to Alaska. Vikings landed in Nova Scotia and other places.
Through DNA testing, they claim that Indians came from Northeast Asia; Southeast Asia; and Europe.
All Indian Nations have their own traditions and stories about Creation.
You can claim as your ethnicity whatever makes up the majority of your ancestry. You can, of course, say I have Cherokee ancestry, black ancestry, Asian ancestry (if you have any).
You friend is technically incorrect; there are five "races": red (Indians), yellow (Chinese, etc.), white, black and brown (Filipinos, etc.).
In other words, no matter how you cut it, Indians are a different people, with different languages, customs, DNA, the whole nine yards. And they have been here for at least 30,000 years, so they were here before that fabled land bridge was built wherein they would have had to climb to an elevation of approximately 2 miles and carry sufficient food, water, clothing, bedding, tools, etc., for a trek of several thousand miles. Think of that!