Critics have accused Benedict's papacy of insensitivity towards Judaism. The two most prominent instances were the expansion of the use of the Tridentine Mass and the lifting of the excommunication on four bishops from the Society of St. Pius X (SSPX). In the Good Friday service, the traditional Mass rubrics include a prayer that asks God to lift the veil so "they may be delivered from their darkness". This prayer has historically been contentious in Judaic-Catholic relations and several groups saw the restoration of the Tridentine Mass as problematic. Among those whose excommunications were lifted was Bishop Richard Williamson, an outspoken historical revisionist sometimes interpreted as a Holocaust denier. The lifting of his excommunication led critics to charge that the Pope was condoning his historical revisionist views.