@JoanDrake
Just look at what Islam generally thinks of Bahai faith. The Founder was an Iranian Moslem I think. The Iranians (Medes & Persians of Persia then) decided it wasn't a new religion, but Apostate Mohammedanism. The Prophet himself believed that Islam was in a way a reformation, the ultimate expression of Judaism and Christianity. He expected them to become his followers en mass. Later Persia was conquered by Islamic army. The whole history of Islam is forced conversion, conquering and treating Jews & Christians as second class citizens. Anyone not Islamic, Jew or Christian basically had no rights.
Not Catholic, Egyptian Coptic, Syriac, Indian, Chinese, Greek or Russian church is ever going to listen to an Imam, or vice versa. Ultimately the idea that Islam, Christianity and Judaism can peacefully co-exist is a western liberal fantasy. It's not because of the Palestinians that the State of Israel's very existence is opposed by so many.
Islamic groups want special dispensations in the West that don't exist for non-moslems in many Islamic countries.
The Ottoman Empire was more secular than purely Islamic of course, about similar relationship of C of E to the Britiish Empire. So provided the bribes and taxes paid, it was far more enlightened that Saudi Arabia or Iran today in terms of cultural or religious freedoms. But not Political or National freedom. If it hadn't been checked as well as rotted from within, there would be no West with a Christian background today. Just one corrupt vaguely Islamic state.