The problem with the word "cult" is that it is a highly loaded term: it casts an irrevocable pejorative connotation on the person with whom it is being associated and it therefore not factually descriptive of this particular situation. In today's lexicon, it is invoked for manipulative not descriptive- ends. Using the term "cult" belies an attempt to paint an indelible stain on the candidate, and falls short of invoking the name of Adolph Hitler.
The implication that any candidate who generates enthusiasm in young people must have turned their brains into mush is mean-spirited, manipulative, and self-serving. Maybe all those young people are really onto something? Perhaps they're really afraid of the world we have delivered into their laps! I hope so! Would you rather people voted for someone who generates no enthusiasm? If the worst thing Mr. Obama gets accused of is generating enthusiasm, I will be pleased to provide him with my vote!
