http://www.foxnews.com/world/2016/07/31/muslims-go-to-catholic-mass-across-france-to-show-solidarity.

From the above report:

"In Italy, the secretary general of the country's Islamic Confederation, Abdullah Cozzolino, spoke from the altar in the Treasure of St. Gennaro chapel next to Naples' Duomo cathedral. He said there was a "need of dialogue, more affirmation of shared values of peace, of solidarity, of love, out of respect for our one God, merciful and compassionate."

Three imams also attended Mass at the St. Maria Church in Rome's Trastevere neighborhood, donning their traditional dress as they entered the sanctuary and sat down in the front row."

God have mercy on us!