Jews pray to our God, Jehovah, Muslims pray to Allha who is not our God. We do not pray to the same God. Yes there is only on God, but he is not the Muslim god.
“Allah” is not a name - it is the Arabic word for “God.” Arabic-speaking Christians refer to God as “Allah” as well.
Muslims are wrong about the real God in several important respects - the Trinity, the divinity of Jesus - but they do direct their prayers and worship to that God nonetheless: the God of Abraham, Isaac, and Jacob.
Bottom line: Jews overtly reject the idea of the Trinity, too. If that doesn’t prevent us from realizing that they share the same God with us, then Islamic errors shouldn’t prevent us from seeing that they share the same God we have, either.
I always have been interested in harmony and reconciliation among Christians - and, yes, among all people of faith who emphasis love of one another. This religious tribalism - my tribe is right and yours is wrong - strikes me as silly. Too often religion has preached peace, humility and love while promoting hostility, arrogance, and bigotry.
I wholeheartedly agree.
My own practice, for what it’s worth, is worshiping at different places,
in large part to learn more of various faiths and understand them better. By this I mean Christian churches in particular, but occasionally at a Jewish synangogue, Muslim mosque or Hindu or Buddhist temple - etc. We as Christians have a lot to learn. There is much wisdom in other religions and in other versions of our own particular religion.
There is wisdom outside as well as inside Christianity, it’s true. But that doesn’t make engaging in non-Christian worship okay. Remember, if you really believe Christianity, then you believe there is one God who alone deserves our adoration. Only three faiths - Christianity, Judaism, and Islam - even
profess to worship this God - the one Who revealed Himself to Abraham, Isaac, Jacob, and their descendents.
There are some contradictions between Christianity and other religions. Engaging in non-Christian worship that in some way stems from a position that contradicts Christian teaching is an implicit act of approval of those errors. We must avoid that sort of relativism at all costs.
The notion that any one group has a monopoly on spiritual truth had led me to move away from traditional Catholicism, even though I often still attend Mass.
I do not believe the Catholic Church thinks it has a monopoly on truth. Plenty of authoritative Church documents acknowledge that there is not only error but also some truth in other religions, and Vatican II teaches that truth is holy wherever it is found.
It does trouble me, however, when Catholics lay claim to being the one and only ‘true church’.
I don’t agree that we’re the only “true church” either. For starters, every community of the faithful lawfully united under a bishop is in some sense its own church. So there are many churches throughout the world. And even in the broader sense of an autonomous, self-governing body, there are still 23 churches in the world that are actually a part of the Catholic Church. But communion with the bishop of Rome does not automatically preclude the status of being a “true church” - the Orthodox, including the Oriental Orthodox, and the Assyrian Church of the East, among others, are true and valid churches according to Catholic teaching.
So the Catholic Church agrees with you on this.

Nonetheless, we do profess that the fullness of Christ’s Church on earth subsists specifically in the Catholic Church.
You must either think with the Church or remove yourself from the Church. You can’t have it both ways.
Here is what the Church says.
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."
Don’t even go to the cop-out question, “Was that an infallible statement?”
It seems that when it’s convenient and agreeable to people, they never ask this question. When it’s inconvenient or not of their liking, then this becomes a paramount question. Of course, always forgetting that we owe the Ordinary Magisterium an assent of the will. Therefore, we accept what she says. The simple answer to this is that the Church cannot teach that which is contrary to the faith, even through the Ordinary Magisterium.
Fraternally,
Br. JR, OSF
Well put, Brother!
That said, the poster to whom you were responding simply put “Christian” as his or her religion, so (s)he may not be Catholic.
is it a sin to pray with fellow Christians? Are you kidding me? And this is the religion I have been thinking about joining? Yikes!!!
Please don’t be discouraged. I promise you, friend, the replies of
JReducation far better reflect the position of the Catholic Church than some of the more extreme positions expressed in this thread. I hope and think you can see that simply by reading them. The Church’s position is clear, articulate, charitable, and nuanced - just like
JReducation’s replies.