Wait. That's not quite fair. First, I found out that she's a transexual quite easily and so that can hardly be called "outing" someone. Second, I did think about whether I should write that comment, and I thought by pointing it out I was helping, by saying "Look, this person is amazing and she's also a transexual." It's a push against the stigma.
To go to your Nazi example, I felt I was saying, "Jessie Owens just kicked your ass, and look -- he's black."