Unity in Variety

In the name of Allah, the Merciful, the Compassionate.
Allah - there is no God but He,
the Living, the Self-Subsisting,
the All-Sustaining and the Eternal.

Say ye: "We believe in God, and the revelation given to us,
and to Abraham, Isma'il, Isaac, Jacob, and the Tribes,
and that given to Moses and Jesus,
and that given to (all) prophets from their Lord:
We make no difference between one and another of them:
And we bow to God (in Islam)."
So if they believe as ye believe, they are indeed on the right path;
but if they turn back, it is they who are in schism;
but God will suffice thee as against them,
and He is the All-Hearing, the All-Knowing.

Qur-ân, Sura 2,136 +137

And dispute ye not with the People of the Book,
except with means better (than mere disputation),
unless it be with those of them who inflict wrong (and injury):
but say, "We believe in the revelation which has come down to us
and in that which came down to you;
Our God and your God is one; and it is to Him we bow (in Islam)."

Qur-ân, Sura 29,47

Mankind was one single nation,
and God sent Messengers with glad tidings and warnings;
and with them He sent the Book in truth,
to judge between people in matters wherein they differed;
but the People of the Book, after the clear Signs came to them,
did not differ among themselves, except through selfish contumacy.
God by His Grace Guided the believers to the Truth,
concerning that wherein they differed.
For God guided whom He will to a path that is straight.

Qur-ân, Sura 2,213

A Hadith says:
On the day of resurrection God will manifest Himself to the followers of different religions announcing: "I am your Lord" in a form that they refute. Faced with this unfamiliar apparition, they will reject it and seek refuge in their own representation of God. Then God will appear in the representation to which they are familiar and then indeed they will believe that it is Him.

And an other Hadith:
He discloses Himself to the faithful in the form of their beliefs.