Hostility seems to be a hallmark of this church age in a similar way that political correctness is to the world. It is alright for us to be righteously indignant as long as we do not sin. There is a place for righteous indignation, but God does not permit much anger because it is difficult not to sin when angry. That kind of anger is a "mark of the beast."
Frequently, hostility is simply a denial of reality. People do not have tempers born in them; angry tempers begin to be created in childhood. Parents allow tempers to burst forth, and each time it happens, it becomes easier—and the next time and the next and on and on until it is ingrained in the personality.
