I may agree and disagree the contents of Hebrew-Christian scriptures. I may agree or disagree the interpretations of the texts or passages from Jews or Christians. I may understand the texts or passages, or even not understand them.
One thing I don't need, is the Qur'an to understand the Hebrew Tanakh or the Christian Bible.
Like I said before, the Qur'an is a completely different beast to the Jewish and Christian bibles.
And I agree with terrywoodenpic. There is no original "bible". The "bible", whether it be the Jewish Tanakh or the Christian OT/NT Bible, the word "bible" is actually a collection of individual writings (books, letters, etc).
I would agree with terrywoodenpic's 2nd post too: God never wrote any book or scripture, and that would include the bible and Qur'an.
You can't prove that God wrote anything.
What I find ridiculous childishly is the claim(s) that God is an author. If God is truly the author, or the angel Gabriel, then why didn't either one of them just pass the book on to Muhammad, rather than have Muhammad's disciples memorize what Muhammad relay to them and scribble them down. Why pass it on to someone who is SUPPOSEDLY illiterate? Why go through short stage of oral transmission (oral tradition from God to Gabriel to Muhammad to his disciples)?
To me it is outrageously silly. And even less believable than the authorship of each individual biblical text.
I think my post was not intended personally for you or addressed to you personally; it was for everybody; nonetheless everybody is entitled to one's line of thinking with or without reasons and of course to defend the same.
Like I said no other revealed scriptures:
1. makes the claim that it is guardian on other revealed treasure-of-teachings or that
2. it confirms the truth in all other revealed scriptures
3. respects the messengers prophets sent to all the regions of the world and their truthful descent and the truthfulness of their revelations as sent on their messengers.
4. And only Quran provides brilliant reasons on all of this
5. And this is done to rightly eulogize their beloved spiritual leaders and the truth of their scriptures
6. Quran also reinstates the reason part of their scriptures lost in the debris of time by the errant clergy
7. And this restores the shine and luster of all the religions as they all have the same basic teachings being from one source of the one true attributive creator God.
8. This way religion is strengthened in the face of the current atheistic/agnostic/skeptic trends in the world.
This is my sincere opinion and others could believe as per their conscience.
Other points in your post would be answered separately, God-willing.
Thanks for your comments, however