I think I can explain some of the dogmatism seen with XP practitioners. XP is a set of practices for customers, developers, and communication. XP consultants

I think I can explain some of the dogmatism seen with XP practitioners. XP is a set of practices for customers, developers, and communication. XP consultants think that teams should try all the practices. Most XP people don't oppose removing or modifying a practice, but they don't see why you should remove it before you've tried it, especially when the reason is something like, "Pair programming will never work here." Try it for real, then make it your own. In discussions between agile groups, XP people are often confused by, say, Scrum, because the Scrum consultants teach fewer practices and use funny vocabulary. But I'd say that most XP people would prefer to work in a Scrum environment than in many more traditional environments, and they would say so if you asked them.