He was effective, in the same way that advertising campaigns are
  effective. He was effective, in the way that movies are
  produced. He's effective, in the way that Anthony Robbins sells
  seminars, CDs and tapes. I bought a set of his tapes in the 90s.
  Very useful stuff, his brand of NLP.

  Hitler was a businessman and a marketing genius and a showman.

  Hitler was Dark Side P.T Barnum... although whether PT Barnum
  was Light Side is questionable as well