If Rome actually taught that Jews and Muslims by their systems' theology already worshipped God the Father (who is always one with the Son if he is to be worshipped at all), that would be pretty clearly contrary to prior teaching, which is why I'm confident the casuists permitted the phrasing that retains ambiguity

It is contradictory and it is obvious. The whole Vatican II ecumenist position and the prior scholastic natural theology doctrine is incompatible with the teaching of the Church that Christ is the only path to God the Father. This is why you don't put reasoning and empiricism before divine Revelation.

The whole RC system is full of such contradictions. Remember when the Pope called crusades against Islam which was condemned as satanic heresy by Rome? The same office of the Roman See now calls for open borders and talks about how the Muslims adore the one true God. Come on. Forget the semantics and how they can massage language to make you believe gray is white (because saying black is white is too obvious and they're incrementalist). Just step back and look at what the current position is and compare to what the position 1000 years ago was. And that's just a single issue. Don't get me started on the skittles stuff, the raves and clown masses.