His argument is fallacious from the word go. He constantly implies that expert runologists, in one voice, declared KRS unauthentic. But this is quite simply a lie. Blegen's reasoning is plainly fallacious. Please examine his reasoning above.
False premise creates a fallacious argument right from the start.
And on he goes to weave the most paranoid of conspiracy plots, gratuitously slandering any number of innocent people to fill this pressing need for a forger. I've already given my proof of why Kensington Rune Stone cannot be a forgery. There are only two possibilities to choose from. No such medievalist was ever found anywhere close to Kensington MN, ca. 1898, or before. All the locals were very well known to each other.