Granvater emphasizes that the issue is not about people's beliefs changing in a mob, but about thresholds, which are external factors based on peer pressure. He distinguishes beliefs as internal positions and thresholds as external pressures, noting that they often do not overlap. Granvater argues that an individual's behavior is often guided by their threshold rather than their beliefs, citing examples of reckless behavior driven by low thresholds. Furthermore, he highlights that everyone's threshold is different, with some individuals needing only slight encouragement to engage in certain actions.