You're right, you didn't specifically enter any part of the debate. But you did post the graph in the middle of the debate expecting some kind of reaction. The posting of the graph alone was enough to make everyone on one side of the argument believe that you were targeting them with the graph. It doesn't take a genius to think that's what the intent was either.
Seriously, if you want no part of this debate and are just here to "see the reactions of the participants", then why do you even post? Why even read the thread?
Your personal history was brought into it because if you act like this IRL then yes, it's no wonder those things happened to you. Just because you're actually benefiting from the bad treatment you received, doesn't mean you were right in the first place. All it means is that you suddenly have friends in high places. We've seen time and time again how that works out in the end.