I don't see why "Islam" could not also be seen as a transcendent term, in that any religion that was revealed by God through a prophet or messenger is Islam, in

I don't see why "Islam" could not also be seen as a transcendent term, in that any religion that was revealed by God through a prophet or messenger is Islam, in so far as that religion conforms to His will. Quran 3:19 Indeed, the religion in the sight of Allah is Islam.