Silly Peguy, those folks are to Sunni Islam what some of the born again "fundamentalist" Christians are to Protestantism, roughly speaking.
Right, my question, which may help to answer that same question a little more meaningfully. Please rank these in order of importance to you as a Muslim, most to least, and saying if any are of equal importance:
The prescribed rituals (such as daily prayer and fasting)
The "Five Pillars of Islam"
Your intuitive personal spirituality/connection with the divine
The guidance and pronouncements of the clerics