The concept of the Trinity is merely an
interpretation, Arian Christians did not believe that all three Entities are one and the same.
A Christian does not to have to believe that God, Jesus and the Holy Spirit or one and the same and all
equal....nowhere does it explicitly say so in the bible, so is merely an
interpretation.
Also, the argument by the Moslems that Mohammed is the 'last prophet' so his version is the final and right version doesn't hold water.
Then what about the Mormons? Or the Moonies....? Or Jehovah's Witnesses...?
They use the
same argument as the Moslems.
One could then argue that Islam is merely an offshoot cult from Judeo-Christian religions.
And no-one seems to want to answer this little question:

What kind of sick demonic cult gives its followers a huge amount of prostitutes and whores when they die so that they can have a huge orgy....?
The Mohammedans are not allowed these types of sexual indulgences on Earth, yet such depravity is deemed OK when they're
dead..?