I think you’ve put it very well.
People’s ideas about God can be a mixture of truth and error. And they can worship the one, true God, even while believing errors about him.
I have noticed on FR that some are determined to say, not merely that Muslims believe many errors about God, but that “Allah” IS Satan, and that all Muslims must be knowingly worshiping Satan (or a Moon god) rather than God. That is just stupid. “Allah” is clearly the name that Muslims (and many Christians!) use to refer to God.
I think it is obvious that Satan has much to do with Islam. Islam is anti-Christ. It denies the Trinity and the Incarnation of the Second Person of the Trinity. That is the very definition of anti-Christ.
I am sure that there are many great, holy mystics among Protestants, Jews, Muslims, and even pagans, and that many in those religions have experienced baptism of desire, and thus have the theological virtues and sanctifying grace, and will enter into the Beatific Vision when they die. The Catholic Church has always taught this. The claim that only those who are baptized with water in the Catholic Church and are registered members of a Catholic parish can be saved has been explicitly condemned as a heresy.
"Many"? You are "sure"? Where does the Catholic Church teach that Baptism of Desire is something that happens often and where does the Catholic Church teach that we can be sure and hope that there are many people ....in non-Catholic religions.... that will be saved by it? Father, with all due respect, you have been drinking the Vatican II Kool-Aid for too long.