This would be hilarious if it weren’t so sad. Some liberals are worried about whether we should allow abortions for children with genetic disabilities, because such abortions could harm the cause of — you guessed it — diversity.

“If the response is simply, ‘You all are just anti-women’s-right-to-choose,’ I think that misses some of the important disabilities rights issues that are being raised,” said Andrew Imparato, president of the American Association of People With Disabilities. Mr. Imparato said he was disturbed to learn recently that in several states with legislative efforts to restrict abortion rights, groups like Planned Parenthood often lobby for an exemption for women who learn their child would have a disability. But he said that the person who alerted him was a Planned Parenthood lobbyist who was herself troubled by the tactic because it seemed to run counter to the progressive political agenda that supports both choice and tolerance of human difference. “You’ve got these two basic liberal values on a kind of collision course,” said Rayna Rapp, an anthropologist at New York University who has studied attitudes toward prenatal testing.