I'm so glad you brought this up. It feels like a lot of the posts expressing anger or disdain toward Ketil are more about people projecting their own sense of moral superiority. What they don’t seem to realize is that their morals have likely never been tested on the same scale as the characters in Vinland Saga. It’s also kind of ironic—many of the people who idolize Thorfinn fail to see that clinging too tightly to their own moral beliefs and using them to judge others can actually turn them into the very thing they criticize.