You do not need Vitalik Buterin to call Craig White a fraud. Craig White has already made a fool of himself by claiming that he was Satoshi and trying to deceive journalists. He is also running around trying to file patents, when Satoshi released his work as open source. Given this background, Craigs claims of being Satoshi are obviously fraudulent.
that's why this court case with write and the other creator's estate will be so much fun to watch. get the popcorn!