Some ultra-traditionalist Catholics in Argentina are openly challenging Pope Francis. Sunday night they disrupted one of his favorite events, an interfaith ceremony he celebrated each year as Buenos Aires archbishop to promote religious harmony.

A small group disrupted the event in the Metropolitan Cathedral, shouting the rosary and the "our Father" prayer and spreading pamphlets saying "followers of false gods must be kept out of the sacred temple." Their leader, father Christian Bouchacourt of the Society of Saint Pius X, said Monday that the pope "is not infallible and in this case, does things we cannot accept."

The annual ceremony brings together Catholics, Jews and Protestants to mark the anniversary of Kristallnacht, when 1,000 Jewish synagogues were burned in Nazi Germany, launching the Holocaust that killed 6 million Jews.