what is ninjutsu and what is not
As always, if you want to check the cook, taste the food. As a practitioner of traditinal ninjutsu I know that it is foolish to believe that our Ninjutsu is the only legitimate Ninjutsu. I do not think that Mr. Dunken thinks that his is the only "real" Ninjutsu . The point is: it does not matter where the system originated , what matters is the honesty and technical level of the practitioners, the amount of years they practice seriously and what kind of people they are. If the answer is positive to all the criterions, then what does it matter if mr. Dunken or his representative in Israel are practicing "real" Ninjutsu. If, Hypotheticaly, they do not advocate any behavioral code apart from naive romanticism and aggression, then may God have mercy on their souls and their students.. ,