[mother]

"Andalusia, the pre-Christian Muslim civilisation of Spain"

I had to chuckle at that. There are lies and DAMN LIES!! Spain had already been Christian for several hundred years prior to the moors invading .....

[muawiyah]

Spain had been predominantly "Arian Christian" prior to the Moslem invasion(s) (to be technically correct). Now you may or may not consider the Arians who ruled Spain to have been real Christians or not ~ last time I looked the Roman church didn't accept the legitimacy of their baptisms, but there may have been exceptions.

What I think we need here is someone who knows the details of Ecclesiastical and Theological history in Spain circa 350 to 750 to enable us to address this issue of whether or not Islam is pre-Christian, or post-Christian when it comes to Spain.