I disagree, chrisL. Some children are extremely astute, and most know a hell of a lot more than adults think. In my case, for example, I was told that my father had died in an accident when I was in the 2nd grade. i knew that it was a lie, and suspected that it was suicide. I was right.
The child, in this case is learning passive resistance to bigoted people, and screaming hate filled people. It is a useful lesson. And you can bet that she had been educated by her parents. She is obviously at a gay pride parade, and wearing a rainbow skirt. At that age, she is likely to see worse at church, if she had different parents..