so wait, your "proof" is 1 Jew who is known as a blunderer...and other non-Jews who used their scholarship to "prove" that the text is not from God. Why don't you just claim "documentary hypothesis" and be done with it. None of what you posted is a proof that any Jew ever hid, corrupted or changed anything, just that
1. A Jew thinks that an "unknown person" ADDED a list
2. Others who think that there were other authors besides Moses
If I publish a website that says that other Suras were added well after the year 1000, does that "prove" that Muslims corrupted their texts?
You have much to learn about claims and proofs.
Without looking for it's claim or not,it's obviouslly can't be belong to God.
because it's represent God as ignorant and weak.