Why aren't all Iraqis Arabs? This is a serious question. How is it that some Iraqis are not Arabs?
I think that Kurds may not be Arabs, though I don't insist on it.
Because they aren't, just as all Americans aren't Englishmen. Arabs, Kurds and Chaldeans are different ethnic groups who happen to live in the same nation, with the members of the one far outnumbering the other two.