@C Z I agree with some qualification. Even to Muslims, especially Muslim women who are oppressed and abused by the teachings of Islam, (for example, Islam teaches that a husband may beat his wife), Islam as an religious doctrine and ideology is the common enemy of Christians and Muslim people.

one could use the following collection of covenants between the prophet Muhgammed and the christian world to get Islam on our side against the common enemy
The Covenants of the Prophet Muhammad... by Morrow, John Andrew (amazon.ca)