Back then an argument was that she should have made the effor to understand Sanji's actions as she was in *similar* situation in the past, but idk why would a rather emotional character coldly analyze the situation when Luffy was getting the shit beaten out of him until he collapsed on the ground by the guy he fought an YC for dozen hours to save.
Arlong Park thing doesn't really work for a few reasons but that'd require a longer post.