Religious people have a habit of developing a similar relationship to their doctrine and beliefs Over time, many become a connoisseurs of their religion. People who learn to appreciate and make subtle distinctions develop a refined sense of what kind of behavior and belief are okay and not okay. They develop an interest in detecting the subtlest of theological distinctions and nuance. They prefer to congregate and associate with other people who like the same kind of doctrines and dogmas.
Nothing is wrong with developing a mastery of religion. The problem is that mastery of our religion has almost nothing to do with Jesus and what he came to do in the world.