I've been rereading Zen & the Art of Motorcycle Maintenance. This quote really struck me:
"You are never dedicated to something you have complete confidence in. No one is fanatically shouting that the sun is going to rise tomorrow. They know it’s going to rise tomorrow. When people are fanatically dedicated to political or religious faiths or any other kinds of dogmas or goals, it’s always because these dogmas or goals are in doubt." ~ Pirsig, Robert M. (2009-04-10). Zen and the Art of Motorcycle Maintenance (p. 140).
Made me think of all the zealotry accusations levied at Extreme Programming practitioners about 10 years back... still seen in reaction to some of the more ardent claims of the primacy of TDD even today.
No conclusions, just suspect I will see the next fanatic a little differently next time I encounter one.