If his mother is American, and his Dad is British then he is half british, half american. My father is Pakistani, and my mother is English and I definitely regard myself as half Pakistani. I have a lot of family there, half my family lives by a wholly differently culture to the other half. If you want to consider him 100% American, that's your lookout, but bear in mind that many people are actually quite proud of their heritage, and it is this mixing of cultures that makes the society that we have today as tolerant, and interesting as it is.
I don't want to start a flamewar as seems to have happened a bit in this thread, but your comment riled me a little :-)
No I see what you meant, but here's the thing, he's not born in the UK and then live in America, wouldn't that be considered half-british? rather than born and raised in America but father's british?
No I see what you meant, but here's the thing, he's not born in the UK and then live in America, wouldn't that be considered half-british? rather than born and raised in America but father's british?