I think it's very sad that you left him without any help simply because you perceived some insult in what I would have interpreted as him just trying to break the ice and alleviate any nervousness you might have. I'd be a bit nervous for any man to approach me in my car alone,but if he had come to me and said that I'd have smiled and laughed and said he's not scary to me and helped him. Helping our fellow man shouldn't be conditional, especially since he happened to choose words that he may not have meant in the way you took them at all, but that's my opinion.