Well, when all you have to convince people that they should work for you is promises of eternal bliss after death without any kind of proof, you can't really expect nobel prize material to flock to you...
But that's not all fanatics have. It's just local flavoring. What their message is is the same as always before: "All your problems are caused by group X. Join me and take your revenge!"
Such memetic viruses don't strike at stupidity but at lack of self-awareness and -control - in other words, immaturity - and consequently, being smart - even Nobel-smart - doesn't help protect against them. In fact, should the infection take hold, all that intelligence will simply be used to construct elaborate rationalizations of the fanaticism's guise which make it even more virulent.
Fanaticism is a memetic disease. If you have lots of angry young people, you get outbreaks, just like with flu. And sooner or later one of these outbreaks mutates into a form that can cause an epidemic, or perhaps even a pandemic. In the 30's, we got fascism which eventually mutated into nazism; in the middle of the century we got small outbreaks of red terrorism, but thankfully general prosperity made the population too resistant for transmission to continue except in much-diluted form; and right now we're seeing an epidemic which is parasiting on Islam. Islam itself isn't the problem, it simply provides a new outer form - like robes for a ringwraith - for the same force that was behind Hitler and has now returned for round n+1. But the heart of this darkness is the same as it has always been.
The question is: what to do about all this? Is this some kind of inevitable function of human biology or merely an artifact from our cultural past? Would it be possible to rid the world of suhc maladjusted memes once and for all, or perhaps develop memes that work as antidotes - for example, surely knowing all this helps notice when someone's trying to pull the trick on you? As noted above, greater general prosperity would help a lot, but is not foolproof, is already being worked on, and perhaps most importantly, current iteration of the fanaticism pandemic seems to be evolving to get around it - bin Laden came from a very privileged background, and many people who have lived their entire lives in the West have gone to join Isis.