Children are members of society. They're imperfect, but still. As other members of society, we have a duty to at least tolerate them.
I find it very sad that some people treat them like a different species. You wouldn't hear people say, without being countered, "I don't want to see old people" or "I don't want to have to interact with women". It's fucked up, you don't choose the other members of society.