Why do people react sensitively to religious issues(Daniel)

From my point of view,people react sensitively to religious issues because they have a very strong believe in their religion.They were raised from young with that believe and that religion and thus,it would cause them to have a very strong sense of belonging to that religion,also they would then respect the believes of that religion very much and would not tolerate anything that has bad image,impression,insults to the religion,as it would meant that they are look down on,insulted badly and greatly disrespected.