Not coming in defense of Valjian (he has already given his reply), but he has enough knowledge of Bible (even I have). But what is written in Bible does not prove either the existence of God or any divine mission of Jesus, it does not prove heaven, hell, deliverence or final judgment.
As I said to Valjian, nothing can be proved to those with faith. This was the teaching of Jesus in the parable of Laza
rus.
Luke 16:19-31 "31 “He said to him, ‘If they do not listen to Moses and the Prophets, they will not be convinced even if someone rises from the dead.’
That was the story spun by Paul, Gospel writers and others. If you want your book to be respected, you should respect the books of other religions as well.
I can respect the books of other religions provided they are consistent with the bible. Thus wisdom books are found the world over, and they contain what I would concur to be wisdom. Books coming after Christianity are to a lessor or greater extent based on Christianity, in any case.
Judaism and Christianity also were pagan religions of a people (you said: all things not Christianity are paganism). Sikhism is a beautiful religion followed by 25 million dynamic people who are always in the forefront to serve humanity.
Guru Nanak is 1500 years after Jesus Christ. In that time, the whole of Asia had been evangelized first by the Nestorians, and other Christians, and also conquered by Islam & then the mongols, who having converted to Islam, conquered India. Sikhism seems to be a syncretic cross between Hinduism and Islam, which seems not to be a good basis for being deemed supremely authentic.
It has been criticized. Its scriptures have been termed incoherent.
Jesus is looked on as a "saint" by sikhism. In common with the Islamic misunderstanding of Christ as the son of God, sikhs reject his sonship, largely because they fail to grasp what it entails, which is not that he was God, but that he came from God.
It is this age-old problem of misunderstanding the sonship of God that has led sikhs to reject Christ and adopt the Islamic version of Christ, which is pagan in Christian terms. That's not to judge sikhs, because all outside the church will be judged by God, but it is to say that sikhism is unavoidably a heretical religion in Christian terms. Much of sikh theology is completely incompatible with the teachings of Christ.
You take myths and stories as truth, do not blame the others for it. Jesus saving people from an imaginary hell is only a Christian canard.
Hell is a necessary concept to judge the wicked. If you don't believe in hell, you don't believe in the judgement of the wicked or in a reward for the righeous. Judgement is perhaps not an attractive doctrine to many, as it interferes with their liberties. But as the parable of Lazarus discloses, hell must exist if God is just.