The original God's religion is the monotheism and exclusive devotion to God alone: that is to worship God alone without associate, son, parents or peer.
The present religions are the distorted versions of the original God's religion .. such religions have been transformed into the idolatry .. by the way of the enthusiasm about the religious figures like the Christ, his mother, the saints (of Christians), the imams and sheikhs (of Muslims) and (the Jewish) sages and their tombs.
But the pure God's religion is true and not fake.
The fake is the idolatry, the distorted religions and the atheism.
Quran 3: 83, which means:
{What [religion], other than the religion of God, is that these [Jews and Christians] crave,
while to Him is resigned whosoever is in "the heavens and the earth" [: the planets including the earth], willingly or unwillingly, and to His [judgment] shall they return [after death]!?}
More explanation is at the link:
http://quran-ayat.com/pret/3.htm#a3_83
quran-ayat.com/pret/3.htm#a3_83
