When I've taken pedagogy class, I've always been told - to be a successful teacher, you need to have 100 different ways to teach a topic to someone, and always be looking for more. In a way, indoctrination is just a highly controlled level of teaching - Teaching without critical thought. With that comparison in mind, it make a lot of sense that there would be many different ways for Clerics preaching extremist ideology to approach and convince any person of any background. So of course the methodology would be different, just like it is for visual learners vs tactile learners, only on an expanded scale. Does the methodology used to convert make a difference, really? A the end of they day they are playing on peoples dreams and fears no matter their socioeconomic background, faith, or race.