Why does Bruno foresee that catastrophe is going to strike on the night lieutenant kotler comes to dinner?

Bruno foresees catastrophe on the night Lieutenant Kotler comes to dinner because he senses the tension and discomfort that the lieutenant brings into their home. He feels that Kotler's presence is oppressive and that his behavior is harsh and intimidating, particularly towards his family and the household staff. Additionally, Bruno's instinct tells him that the dinner will not go smoothly, as the atmosphere is charged with unspoken conflicts and the oppressive nature of the Nazi regime. This intuition foreshadows the impending turmoil and conflict that will arise from their interactions.