Why might Jonathan be mad at Jasmin?

On the last day at the cabin, Jasmin was depressed because her abductor was bringing home a pregnancy test that evening. She hated to think she was pregnant. Jonathan tried to cheer her up with a snow globe his father had given him when he had given Hannah Fraulein Tinky. When her abductor came home, Jasmin had taken the opportunity to use the snow globe to bash in her abductor's head. Jonathan is probably mad at her because she took his special possession and killed his father.