Michael Moore is once again the toast of Cannes, where the European audiences have always enjoyed his blistering attacks on American government and corporations. Farah Nayeri says that Moore’s latest film, on America’s floundering health care system, has less ranting and more legitimate documentation than some of his past efforts. But Moore was confronted after his Cannes screening by Canadian journalists who say that his glowing portrayal of their country’s national health care system is flatly inaccurate.