Abdullah Ocalan isn't exactly a household name in America. But he's more notorious even than Osama bin Laden in Turkey, where his Kurdistan Workers Party (PKK) waged a terrorist and guerrilla war that cost an estimated 37,000 lives. Last week, incredibly, the European Court of Human Rights ordered that he be given a new trial. For Americans, this verdict should serve as yet another warning about the dangers of joining permanent multilateral legal institutions such as the International Criminal Court. ICC backers claim that the court can be trusted to exercise its authority with prudence and discretion. But the Ocalan...