Not too long ago, Chaos had gotten rid of the wandering knight that stopped its minion from eating Damien years ago.
That old hag was among its top hundred worshippers. She had received its blessing six times, and if she had succeeded in eating Damien, his godly powers would have awakened, destroying the entire county and everything around it. But then Damien's godly power would have been left with no owners, and Chaos would have gained a chance to subdue it.
However, that didn't happen because of the nosy wandering knight. Because that man foiled its plans, Chaos schemed against him heavy-handedly. That man was nothing like Damien. Chaos only wanted to make him suffer. Although Chaos lost three of its priest, it succeeded in killing that man. Though it failed to kill his family and friends as they were protected by the emperor's knights.
He was just one of the many Chaos had killed because they dared to protect Damien from itself.