We Are Better Than You
One of the most common tropes you hear from religious people is some variation of the theme "we are better than you". The "we" may refer to religious people in general, or it may refer to any subdivision in the taxonomy of religious beliefs and cultures. The "you" refers to anyone who is not identified as being part of the select group. Claims of this sort are therefore an expression of some kind of tribalism. These days, with the declining rates of religious belief, and the corresponding rise of alarm and anxiety among believers, there is deepening concern that the "others" represent an existential threat to their religious culture.
In response to this perceived threat, they tend to revert to the behavioral patterns of their ancestors of long ago who lived in tribal groups with strong social bonding, and fought for their survival against rival groups. They enhance the social bonding within their own group by differentiating themselves from the "others", often through the use of stereotypes and various dehumanizing devices. In this way, it becomes morally acceptable to engage them in battle, to inflict harm or punishment, or to treat them dismissively or with disrespect.