The premise as expressed in that article is badly flawed and just demonstrates the depths that zionism can sink to.
It is well known that copycat killings regularly take place after these horriffic attacks. The less publicity they receive, the better. Anonymity removes one of the major stimuli to such copycat horrors.
With regard to Hitler in the age of the internet, my contention is that he would have been even more successful than he was (at least in the short term) if he and his followers had access to Facebook etc......