I'm afraid you don't decide what comes across as hostile. Things can be discussed in many ways, yours is one of assuming to hold all the answers in a conversation with a stranger you know very little about. I would reconsider this. You don't know what I was buying, for what reason, or if there was a realistic alternative. You just say "you weren't born with it", and "it's the truth". An unconvincing way to argue whatever point you actually have.