I wouldn't go so far to say they deserve it but it is not unexpected that it happened. They had a boat full of bibles so obviously they were over there trying to do some good.
Yeah, they definitely didn't deserve what happened, but it's a risk you take by doing such things.
However, I don't go for the bible meaning they were doing good things. More people have died over bibles and religion than anything else... But maybe they were, I dunno.