bism Allah wabi hamdih,
“Do not argue with the followers of earlier revelation other than in a most kindly manner – except those of them who did wrong and are oppressors – and say ‘we believe in that which has been sent down to us and that which has been sent down to you; for our God and your God is one and the same, and it is unto Him that we surrender ourselves.’” (29:46)
Now I do plan to criticize certain things in the Bible (i.e the old and the new testaments), but I certainly do not think them to be completely false. As for the four Gospels, all scholars of Christianity will tell you that they are not the origial Gospel of Jesus (pbuh), but were written between one to four centuries after. The oldest surviving Gospels according to them are the Gospel of Thomas and the lost Gospel that they call 'Q'. The Gospel 'Q' is lost, but parts of it were reconstructed from Matthew and Luke because both Matthew and Luke copied the Gospel Q and incorporated it into their Gospels, adding stories around the quotes of Jesus. So I will say that I do not believe in these four gospels as having been originally the words revealed by God to Jesus.
As for the Torah, I do believe that it was revealed by God, but that certain stories were added to it later, and thus it was corrupted and is not anymore the word of God.
But the transgressors changed the word from that which had been given them (2:59)
Among them are unlettered folk who know the Scripture not except from hearsay. They but guess. Therefore woe be unto them who write the Scripture with their hands and then say, "This is from Allah," that they may purchase a small gain therewith (2:78-79).
And so the Torah can still be considered of divine origin, albeit not all of it. God says,
And when there cometh unto them (Jews) a Scripture (the Qur'an) from Allah, confirming that in their possession... (2:89)...
Also, many Jews came to the Prophet Muhammad asking him to settle their disputes since he was the leader of Medina, and so God revealed the following verse to the Prophet:
Why do they ask you to judge among them, when they have the Torah, containing God's law, and they chose to disregard it? They are not believers. We have sent down the Torah, containing guidance and light.... (5:43-44)
Now I once read about the hidden code in the Book 1 of Genesis that was discovered by some rabbis, and the discovery was so strong that it was included in two scientific journals after being peer reviewed (http://www.science-frontiers.com/sf105/sf105p02.htm). But since then it has been debunked several times, and the case is pretty much dead. Nevertheless, before having heard of it being debunked, I picked up Genesis to read it, and I was stunned by its beauty. It has a beautiful repitition that reminded me immediately of Surat al Rahman and the last half, or maybe third, of Surat al-Shu'araa. Each of the three has a very different type of repitition, but they're all beautiful. In the case of the Genesis, it goes like this:
5: And God called the light day, and the darkness He called night. And there was evening and there was morning, one day.
8 And God called the expanse heaven. And there was evening and there was morning, a second day.
13. And there was evening and there was morning, a third day.
Now it doesnt sound too beautiful here, because I took away all the parts in between, but if you just read all of Book 1 in Genesis you will be able to appreciate its beauty. I just felt like this was written by He who created the two suras of al-Rahman and al-Shu'araa (and God knows best).
Of course you might be wondering about the authenticity of Genesis more than any other part of the Gospel because it describes the creation of the world in seven days, however you must know that this interpretation is quite wrong, and the Muslim scholars have corrected that false Christian interpretation. First of all, a day with God is not the same as a day for us, because time is relative, and because "day" simply refers to a certain amount of time. Thus God says:
"Verily a day in the sight of thy Lord is like a thousand years of your reckoning (22:47)"
"He regulates the affair from the heaven to the earth; then shall it ascend to Him in a day the measure of which is a thousand years of what you count. (32:5)"
"To Him ascend the angels and the Spirit in a day the measure of which is fifty thousand years. Therefore endure with a goodly patience. (70:4-5).
Thus a day could be like 1000 yrs, 50,000 yrs, or more!
And proof of that is in Genesis itself but it was the Muslim scholars who figured it out:
"...but [the period of creation] was a period of time which cannot be measured by a day and night, for the cause of these periods is the sun with its rising and setting, and both the sun and the moon were created on the fourth day of the week. How is it possible to imagine that these days are like the days of our reckoning! The Qur'an says: 'A day in the sight of thy Lord is like a thousand years of your reckoning' (Koran 22: 47). In another verse God says: 'In a day the measure of whereof is as fifty thousand years' (Koran 70: 4). Thus it is obvious that we cannot estimate that period with our method of reckoning, and that it is unverifiable since the beginning of creation."
- Al-Biruni (973-1048)
Since the sun and the moon were created in the fourth day according the story of Genesis, then the seven "days" of creation obviously do not mean seven days as measured by the people who live on earth, because our days depend on the earth's movement around the sun.
Actually when I started this post I was intending to "prove" that the Torah was originally reavealed by God because of the code mentioned above, and to explain the small errors that were found with the code by the Islamic account of the eventual corruption of the Torah (I read one article reporting the discovery that said certain imperfections or errors existed in the code, but I can't find that article anymore). However now that I have found that the whole thing has been repeatedly disproved, one of the main points of this post has been lost. But it is sufficient for me to say that while I will be criticizing certain things in the Bible, especially things in the old testament (since the new testament is not even originally true), I do believe that the Torah was originally revealed by God and I am not criticizing the whole thing.