[Please don't read this, it's garbage.]
The raven is an omen of death, in Wallander, and if Raven Vish were a different sort of man, or if he had led a different sort of life, he might have thought it funny. But in Wallander they love their death omens, or at the very least embrace them as a natural part of being, and he can find no humor or comfort in the coincidence.
They don't believe in luck here. The first few times people asked him why he always travels alone, he answered honestly—"I'm bad luck. It's better this way." He's never been able to choke out a good lie; he feels sick and he stammers and he doesn't convince. But when he tells the truth about this one thing, in this place, people laugh and look at him expectantly, like he hasn't answered the question.