Jesus spoke of his Father as "the only true God." (John 17:3) It makes sense to me that if there is a true God, the other gods being worshipped are false gods. It also seems logical that the true God would reveal himself and his purposes to his worshippers, giving them directions as to how to worship him acceptably. (John 4:23,24) To have God's favor, I believe we must know the truth about God and Jesus, and practice it. Concerning Jesus, Acts 4:12 says; "there is no salvation in anyone else, for there is no other name under heaven that has been given among men by which we must get saved." While God never has and never will torment people in hellfire, I believe he will hold each of us accountable for what we do or fail to do. (Hebrews 4:13)
Lets consider the context of
John 14:6
Jesus is speaking to His disciples who of course are all, like Jesus are all Jews. He has just informed them of His impending martyrdom. They are distraught and He is comforting them. When He says "I am the way, the truth, the light, nobody goes to the Father except through me" He is reiterating that He is the Promised One that the Jews have been waiting for and they need to turn to Him, not to another.
The world of the Jews did not even remotely approach the type of global vision that we have now. The Jews' world vision was confined to surrounding regions throughout the Middle East and what was in the Tanakh. Most Jews were illiterate and relied on religious teachers for instruction.
It must be stated that in no way was Jesus referring to other religions. For example Islam would not come for nearly 600 years. Buddhism and Hinduism although present in India/Asia were unknown to the Jews.
Jesus is also indicating that He will be the new focal point for worship rather than the Temple. This becomes apparent with considering the Olivet discourse (
Matthew 24), John 2:19-21, and
Revelation 21:22
There are scripture that indicate despite the Jews rejection of their Messiah, the issue of whether or not they are saved is not the main concern - see Romans Chapter 9 and 11 and
Mark 3:28-30
It all comes down to interpretation of scripture. Christianity is so divided and has so many different understandings. One person or group understands the bible differently from another. One group insists that their way is the only way to see it. Then they start to see the other group as being misguided heretics, morally deficient, unreasonable, and spiritually blind. They start accusing the other of removing parts of the bible to suit themselves, to twist the words of God, and so it goes. We don't have bloodshed with masses of people dying in the name of Christianity like bygone ages but we have animosity and misunderstanding in the name of God. What loving and just God would expect a reasonable person to persist with such a religion let alone believe in Him?
"Religion should unite all hearts and cause wars and disputes to vanish from the face of the earth, give birth to spirituality, and bring life and light to each heart. If religion becomes a cause of dislike, hatred and division, it were better to be without it, and to withdraw from such a religion would be a truly religious act. For it is clear that the purpose of a remedy is to cure; but if the remedy should only aggravate the complaint it had better be left alone. Any religion which is not a cause of love and unity is no religion. All the holy prophets were as doctors to the soul; they gave prescriptions for the healing of mankind; thus any remedy that causes disease does not come from the great and supreme Physician." Baha'i writings