The despicable foul media at the end of every tragedy is always looking for a motive as to satisfy the vile event and legitimize it.
I don’t think, looking for a motive is always to legitimize the event. We just have a tendency to look for a motive, so we can feel safer that it won’t happen to us.
For example, if she had a crazed boyfriend, then we don’t have the same boyfriend so it won’t happen to us. If it’s a psycho who just picked on her, then it could happen to us.
But in the cases of crazed Muslims who hate all non-Muslims, the media does its best to cover up this motive.