As the most outstanding holy son in the history of the Holy See, Louis became a demon who colluded with demons, massacred cities and genocide, and was a heretic and betrayer of God just because he blocked the protagonist's path.
In fact, these are just charges that the protagonist made for Louis in order to achieve his own goal.
No one believed Louis' explanation;
Louie's actions are deliberately misinterpreted;
Louis ended up being despised by everyone;
In the end, under everyone's puzzled gaze, the world was destroyed by the protagonist himself.
…
After a new life, back to the day when he was accused of colluding with the demon clan, Louis said that this holy son was not worthy of being a dog.
"Destroy it. If you're tired, hurry up."