I know Nostra Aetate is relevant, but the quote I gave is from Lumen Gentium - Vatican II’s Dogmatic Constitution on the Church. Again, I will repeat: “among [those who acknowledge the Creator] there are the Mohammedans.”
It’s right there. In some sense you must assent that Muslims “acknowledge the Creator” and “adore the one and merciful God.”
My answer to this is the same as Contarini’s answer to the question that was posed to him about combining Nazism and theism.
The paragraph in Lumen Gentium that you quote starts with “Finally, those who have not yet received the Gospel are related in various ways to the people of God”
Note: “have not received the Gospel” “people of God”
“On account of their fathers this people (who have not received the Gospel) remains most dear to God, for God does not repent of the gifts He makes nor of the calls He issues.”
On account of those fathers that were faithful (people of God), God offers the gift of the Gospel, plan of salvation, to those that have not received it to their decendants.
It then goes on to say, “But the plan of salvation also includes those who acknowledge the Creator. In the first place amongst these there are the Mohammedans, who, professing to hold the faith of Abraham, along with us adore the one and merciful God, who on the last day will judge mankind”
Those Mohammedans (not ALL) that (who) receive this gift, acknowledge the Creator Jesus, and profess the faith of Abraham, like their fathers (who became people of God, ie: Christians) , will adore the one God (Trinity) along with us, who on the last day will judge mankind (Jesus)
It also says later down:
"Wherefore to promote the glory of God and procure the salvation of all of these, and mindful of the command of the Lord, “Preach the Gospel to every creature”,