as we all know, there is only one God, therefore everyone serves that God....The Muslims have gone astray and have come up with someone called allah who is OBVIOUSLY not the God of the Bible.
Because they have strayed meane that they have chosen to honor a god that does not exist but that, in no way, releases them from their obligation to serve the one and only God....which they do...they, however, do a very poor job of doing so...
Your CCC states differently.
http://www.vatican.va/archive/ENG0015/__P29.HTM
841 The Church's relationship with the Muslims. "The plan of salvation also includes those who acknowledge the Creator, in the first place amongst whom are the Muslims; these profess to hold the faith of Abraham, and together with us they adore the one, merciful God, mankind's judge on the last day."330
I guess what you're saying is ""It depends on what the meaning of the word 'is' is." Do they worship our God before they worship a God who doesn't exist or just do it in a poor way. My goodness, talk about a convoluted sentence.