First of all, the rest of us — Christians, Jews, other Muslims, followers of other religions, non-believers — are under absolutely no obligation to accept the Wahhabis' and their apologists' claims that they represent "true Islam." This is equivalent to the claims of Torquemada in the 16th century to represent "true Christianity." He tortured and persecuted Jews, Muslims, and dissident Christians, burned many at the stake, and stole their property. We are under no obligation to take Torquemada's word that he represented "true Christianity" and would be under no obligation to take the word of any successor should one arise. By the same token, we are under no obligation to accept the Wahhabis' claim to represent the great and just religion of Islam.
"Great and just religion" my ass. This guy still doesn't get it.