That's sad. You went way above what most people would do and it's upsetting that OP would treat you like that after you did so much. From my perspective, what you did is absolutely amazing and I hope that one bad apple doesn't make you change how you'd react in the future.
This is one of those moments when Hacker News really needs an 'upvote' button and an 'upvote and buy lunch' button. Since I can't buy you lunch, at least accept my gratitude and respect. You're a good man and I have a lot of respect for the way you have handled this.