With that question asked, let me first say this to add to that...
The basic Islamic view is that they teach that the Israelite priests corrupted the laws of the God of Heaven and His doctrines and that Muhammad was sent to correct those problems.
I reject Muhammad as a prophet and a messenger. Rather, he was an ignorant fraud that adopted and cross-breed two belief systems, with a pinch of his own beliefs in order to form Islam. Those two belief systems were Judaism and Christianity.
Now with that behind me, this is what I responded to the man that asked the question....
Ahhh, I am not gathering tooooo much what you are trying to ask, but I will take a shot in the dark....
I do not believe the Torah has been "corrupted" in a blunt fashion, for that idea would give the impression that someone tampered with it. That is the Islamic view point, I think.
I, on the other hand, say that the original law of Moses was merely lost or destroyed by the Babylonians.
According to the later chapters of 2 Kings and Chronicles, there was only one copy of the Torah in existence, according to the Tanach. The question is.... Did the Babylonians destroy this copy when they came through.
I lean towards, "Yes," but I cannot confirm that yet. If not, it was somehow lost before 285 BCE. By using the statements, words and myths that are presented in the Torah, it appears that the "new" Torah came into existence somewhere after the Babylonian captivity and before the translation of the Torah into Greek, in 285 BCE, in Alexanderia, Egypt.
So, here is what I basically teach, to clarify. I do not teach that the Torah was corrupted in an outright fashion, as the Muslims teach. Rather, I teach....
Because the original Torah of Moses was either lost or destroyed, the elders of Judah TRIED to re-compile the contents of the original Torah from memory with some added history, age of the earth, certain myths and the lead up to the birth of the Israelite people. They did this by putting several versions of the same story within the New Torah, to possibly get a fuller understanding of things and laws. If you go through the Torah systematically and comparing stories, you will see that Moses did not write our current version AND it was compiled by several authors that had different views.
Two different creation stories; laws are flipped, and narratives are different. Because, the first 11 chapters display a strong Judaized Babylonian myth theme, it would tell us that the current version was compiled sometime after the Babylonian captivity (or even during).
These beliefs of mine came after my own studies of Jewish history and how we were in Babylon for supposed idolatry. Keeping in mind that Babylon would be even more detrimental since they were a polytheistic nation. Likewise, I studied the myths of ancient Sumer and Babylon and Assyria and see that we adopted those myths and canonized them. Yet, the Judean leaders, I am assuming, did not realize that they were adopted and, thus, canonized them.
When one sees a flawless creation, even in the greatest detail, it is hard to fathom that this flawless Creator could have complied a highly flawed book.