Somehow I fail to see how calling Nami crazy and a mad woman for believing in Sky Island would make her suffer. I'd say this action is due to the fact that the Bellamy pirates are jerks who choose not to believe in fairy tales.
(oh boy) And as to your Zoro and Nami factor, I mean no disrespect
but personally I'd go for Zoro and Tashigi. Sure they're enemies to each other now but that's because there's so little info on Tashigi that more is required.