Will the Vatican Protect and Preserve Islam?

Suppose the Muslim world were to lose faith in Islam. Suppose that Muslims ignored the Koran, stopped going to mosque and dismissed Muhammad as a bloodthirsty warlord and slave trader. How would the Catholic Church respond? Would Church leaders greet the news enthusiastically, and declare their solidarity with the newly emancipated Iranians, Saudis, and Egyptians? Would they declare their esteem for the millions who had finally thrown off the yoke imposed by a false prophet 1400 years ago?