Check my post 81 just before yours. Common Greek Orthodox people NEVER worshipped there as you imagine.
I find no references to support your contention. True or not true.
The fact is that it is a Cathedral and not a mosque and thus should be restored to a church.
At the very least it should be used as a place of christian worship.
If you really oppose christianity that much then it should be turned over the Patriachate of the Greek Orthodox Church and allow them to perform services.
Somehow I don't follow the concept that the most beautiful Cathedral of the time would be used as a private chappel when it could be used to impress the masses.
The above article is an aljazeera special. They gloss over the fact that the moslems of spain want THAT Cordoba Cathedral as a symbol of reconquest. Once conquered by islam they don't want to let anything go from their death cult.