Another day, another casualty in a conflict pitting equality and demographic diversity against free speech and diversity of opinion: "A Singapore law professor who was to teach a human rights course at New York University Law School this fall has withdrawn after students protested what they called her anti-gay views," the New York Times reported last week. The anger at Dr. Thio Li-ann's appointment as a visiting professor was understandable: According to a petition protesting it, she had opposed repeal of a Singaporean law criminalizing homosexual conduct and "supported the imposition of a $15,000 fine on a free-access Singaporean television...