What are the motifs in The Missionary Position: Mother Teresa in Theory and Practice by Christopher Hitchens?

The practice of investigative journalism derives from the premise that the reporter is a watchdog over those whose greed and corruption harm society, and whose damaging activities must not go unchallenged. In digging beneath the surface of matters to find evidence of wrongdoing that the offending person or organization has tried to hide, the reporter refuses to take anything at face value.