Jus Blazin wrote:@AlphDoti, @guru, @Muriel, @Lolest, @et al, if Muslims, Christians and Jews believe in the same God, if they are all classified as Abrahamic religions, if all major prophets who passed the message are found in these religions, then the question of which religion is the truth becomes void. They are all the truth. The difference is human nature in interpretation and understanding, leading to differences in beliefs.
My point is, this back and forth we are having here will only create protagonists and antagonists where there's actually supposed to be none.
You have some point, but over simplified. Let me dissect it for you.
(a). First, only the religion of submission to God's Will, the religion that God wants. One word for that in the Arabic language is "Islam". So Quran says no Judaism, no Christianity, but Islam.
(b). Secondly, the whole world will tell you Judaism came before Christianity, and Christianity came before Islam. Because Moses lived long before Jesus, and Jesus lived long before Prophet Muhammad (peace be upon them all).
Let us now analyze:
(c). Ask any Jew what is your religion, and he will tell you his religion is Judaism. This word Judaism is not in Torah. This term Judaism was created, concocted by the non-Jews. Saying it is the religion followed by the children of Judah, in Judea, is Judaism. Moses did not say that. David or Solomon did not utter that word, they never heard that term Judaism.
Jesus never heard the word Judaism 
(d). So next, then what was the religion taught by Moses? Moses never heard the word Judaism. I expect him to say that "
my religion is the religion of total submission to God's will" (a beautiful definition of the teachings of God). And I will tell him one word for that, in the Arabic language
is Islam. No such thing as Judaism or Christianity.
(e). So next, where did Christianity come from?
Did Jesus give his religion saying my religion is Christianity? Did he say that I'm Christ? If you know, Christ is a Greek translation of the Hebrew word
Messiah. Messiah, in Arabic is
Masih, which means the
annointed one. So the Hebrew word for that is messiah, means anointed.
The Greek word for messiah is
Christos. But Chritos is a bit too long, so the cut off the "os" and left with
Christ. So the Greek translation of the Hebrew word messiah.
Jesus never heard the term "Christ" in his lifetime He never heard the word
Christianity in his lifetime, it was unheard, it is a later on creation
(f). Christinanity is a creation. The term "Christianity" is in the new testament. It says that the enemies of the followers of Jesus, pointed to them at Antioch and for the first time they used the term "These are Christians".
Meaning the worshippers of Christ.
Acts 11.26. This was long after Jesus had ascended to heaven, and after Saul had persecuted the disciples and after he had "joined" Peter and his group. Before Saul joined Peter, there were NO Christians. So the Christians liked the term, so they adopted it. From it you get Christianity. That is Christian => Christiniaty, was the term coined, invented by the enemies of the followers of Jesus.
(g). So what does that mean? It means that the group of Jesus and his disciples was not Christian.
ConclusionThese systems: Judaism, Christianity, and Islam are there. But "Judaism" is not in Torah, "Christianity" is not in the Bible. Only "Islam" is in the Quran.