This thread is based on nothing at all. The best act by a LONG way won BGT. It's stupid to start postulating some kind of ulterior motive behind the vote when the best act did actually win. And the thread starter hasn't even bothered to watch the winners, making it even more of an attempt to start something of sound and fury with no actual basis in fact.
And, furthermore, even if the thread starter DID actually watch the winners and conclude that he preferred the singing of the second-placed contenstant to the dancing of the winners, he would surely still have to conclude that when it comes to dancers vs. singers on a talent show, it's not unreasonable for people to prefer the former to the latter.
And finally he would have to explain how out of ALL the acts that entered, the "dodgy voting" somehow allowed Boyle to come SECOND, ahead of all those other popular acts.
In short, this thread has no logic, no basis in fact, no basis in subjective preference and nothing of substance beyond a desire to create controversy where none actually exists.
I can't speak for the American act, because I have no interest in watching an American talent show and precious little interest in how Americans vote in an American talent show. Perhaps there was intolerance there, although you'd still have to explain how that intolerance still allowed him to come second in the whole damn show. Or perhaps the argument for intolerance there is as specious as the argument for intolerance towards Boyle.