If you take a minute to think before trying to put down everyones threads you will see that it does make sense. If, for example, your brother was killed by someone, and then you go to work the next day with a man who had killed someones sister or whatever, you would hate their guts and would not want to be anywhere near them would you?
Now i understand that assault is not on the same scale. But the idea is the same. If i had just had my head kicked in to an inch of my life, i would not really want to be around someone who had done the same to someone else.