Did you read the whole thing?
It's an account of the author who writes honestly about his thought process, and in the end finds out that his prejudice was wrong on one count, and may have been wrong in others.
The whole article in entirety is more helpful than anything I've read about this kind of condition. I'm not sure, and I think the author isn't sure, whether it should be called a mental illness at all. I think that was the point of the article.
So in cases like this, isn't it good to write plainly of one's past prejudices?