Yes, they are.
Same thing as Australians.
The only true 'natives' for the US or Australia are Native American Indians and Aboriginals, respectively.
I laugh when people say 'go back to your own country'. I was in Canberra (the capital city of Australia) a few weeks ago on a day trip, and there was an Aboriginal burning things protesting the government.
He was in a pretty popular scenary place, in front of Parliament house. When people would walk by to try to take pictures of Parliament house, he would flip out and tell them to go back to their own country (although it was mostly Asians walking by). I found it funny, because at least he was a true native.