A built in trait for humans is retaliation. If you have a gun and someone shoots at you you shoot back. If someone hits you you hit them back. If someone curses at you you curse back. It is a human function. Most players on this forum will wait until someone does something to offend them, they will then retaliate. The retaliation will then cause the other person to fight back, and vise verse.
Your beliefs on how you feel everyone should act are no match for human nature.