Strax was reacting in a way no one expected. He was simply quiet...
His mind was replaying various childhood memories with Beatrice, moments when he had started to feel a certain affection for her. These memories didn't seem important now, but they painted a full picture of his feelings. Some might see Strax as foolish for accepting a woman who had simply tolerated his past behavior towards her. The accusations had merit; he should despise Beatrice. But the merging of minds caused by his reincarnation had created something different.
Not only that, but the [Harem System] also seemed to have influenced his mind. Still, this didn't matter now.
Strax was an extremely possessive man. Knowing that one of the women he loved was sad already drove him mad—her being kidnapped?
Kidnapping the woman he loved wasn't just crossing a line; it was devastating to his moral, his persona, his character.