There is only one Father, "The God" of Abraham, Isaac, and Jacob.
NT Christians understand that.
However, this doesn't excuse what your denomination has written, dogmatically I might add, about this in regards to Islam.
It clearly states regarding Roman Catholics and Muslims "together with us they adore the one, merciful God, mankind's judge on the last day."
As with so many things involving Roman Catholicism they have departed from the Scriptures.
I dare say if any of us said anything along those lines the Roman Catholic would pounce like a hyena on the error.