It seemed to me that you didn't just want me to understand, but to condone, or absolve, or even approve. You didn't like me disagreeing with you. Perhaps I don't understand what sort of understanding you actually wanted.
Maybe I was wrong then or maybe you've changed since I said it.
It isn't that I'm not happy for you, or that I don't believe it's possible. It's because I understand what certain emotions and situations can potentially do to someone who embraced the dark side. Because I don't want that for you. I'm sorry to have put that on you.