The only apparently moronic thing here is Boris. And the only thing he "loved" about America was the potential escape hatch and bennies that came with a citizenship. The rules are hardly moronic in a time of heightened need to know that people entering the U.S. are who they say they are. If someone is on record as an American citizen named Bob Smith shows up trying to enter the U.S. on a foreign passport with a foreign accent, they deserve closer scrutiny.
Boris Johnson MP - in his articles in the Spectator - has been one of the more vociferous supporters of the Iraq War and of Britain's involvement in it. He is also one of the keenest proponents of individual liberty on either side of the Atlantic. And his body of work is chock full of admiration and love of America. His many, many articles for the Daily Telegraph are all searchable through the Internet.
He is not as staunch a Conservative as I would like - he's no Churchill, but he is a great friend to America. So what if he regularises his position as a Briton? He's never lived in - nor voted in - America. Nor has he ever asked America for handouts. He's not betraying America - he is sorting out a bizarre problem caused by jus sanguineris.