There are several cultural strands involved, I suspect. Some might be:
- What the person has been used to in their home country and an inability to see the world any other way.
- 'My way of life' is better than your way of life.
- The innate belief that your tribe is better than any other tribe. [Tribe may be defined as anything, incluidng being from a particular suburb of a city, to supporting a football club, to an entire nation]
- The encouragement in the past 40+ years that we have rights that can superseed others. Most noticable this year in those who will not wear a mask, for several different reasons, but all amount to not caring about others.