Complex sentence: Sociologist Ronald Lawson has also noted that the group allows little room for independence of thought, and no toleration of doctrinal diversity; he says those who deviate from official teachings are readily expelled and shunned.
Split into simpler sentences: Sociologist Ronald Lawson has also noted that the group allows little room for independence of thought, and no toleration of doctrinal diversity. He said those who deviate from official teachings are readily expelled and shunned.