The fallacy of Islam is not that they worship a false God. They worship the one true God. Thus, any Arabic-speaking Christian could safely pray "in the name of God, the merciful and compassionate." It's not unlike the way St. Paul established a rapport with the Athenians who worshipped "an unknown God." St. Paul didn't rail against the Athenians for worshipping a moon-diety or some similar fundamentalist nonsense - rather, he took the Athenians' claims at face value, used them as a starting point, and built from there.
It is simply false that Muslims worship the "moon god." They truly worship the God of Abraham, Isaac, Jacob, and Jesus. The do so deficiently, since they have no conception of either the Trinity or the atonement. That deficiency, however, doesn't invalidate their legitimate claim to be worshipping God. Especially since Arabic Christians since time immemorial worship God under the name Allah.
Well phrased.
Dear jude24,
That's close to how Catholics think about this. We believe that Muslims worship the true God falsely.
We believe that knowledge that there is one true God can come from human reason unaided by supernatural grace. One can know with unaided human reason that the one God is omniscient, omnipotent, and omnipresent.
This is what Islam believes. It is clear that the object of Muslim worship is the true God. But Islam, being a false religion of a false revelation by a false prophet, can teach little beyond what can be known by reason. Thus, the nature of God that is discovered only through Divine Revelation is impenetrable to Islam.
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