I think he's referring to your topic content. Taken from the topic title, it starts out bad. While I personally feel that the topic is valid (because I have also heard the common saying that half-races are more attractive than people from the respective individual races),
Mike Cash's post, while extremely blunt, sums up what most people think of the topic.
I feel that if you had asked how the children are perceived, not the fact that they are ugly or good looking, the topic may have had a different outcome. Just like how the moderator who closed your topic thinks: