when you create an identity by despising other groups, it makes you dependent in many ways on them. Ironically, the “other” becomes part of who you are. You need for them to stay in their place and to fit your stereotypes of them. And if something threatens your one-dimensional, negative view of them, it shakes your very foundations. This is what brought Cain to kill Abel, and why Peter responded violently as well. Their false identity was shaken, and rather than change it and give it another foundation, they lashed out at the people who were endangering
