Not fond of Davis...I always think its remarkable when Americans claim they arent Americans to appeal to an audience.
Americans seem to have trouble knowing the difference between Hereditory and Ethnicity. One describes where your family comes from, one describes what you are.
Marcus Davis is American, he's not Irish because he wasnt born there!!! He might have heratage links, but I find it annoying that he claims to be one of us, when he...well...isnt
He's American, and there is nothing wrong with that, be proud of your heratage, but dont try and fool a crowd in the UK that you are one of them