Islam critiqued subtle detection; a change in Allah's word?

In answer to the video "Quran vs. Tradition: The Miraculous Muhammad"

Kalimatullah in these contexts is simply the word of God in the sense of His promise as amply used in the Quran 6:34,115,10:64,18:27 etc. Such divine word is a command that can never be reversed or altered once issued 13:41, it can be the promise of victory and assistance to the messengers and their followers 37:171-2 or the promise of chastisement to the rejecters 58:21 or again the promises of miracles or blessings whether in this life or the next. This is because, as repeatedly said in the Book, Allah's statement is truthful and He never breaks His promise

10:55,33:4,38:34"The truth then is and the truth do I speak" 39:20"Allah will not fail in (His promise)".

God placed the responsibility on humans to preserve the integrity of His revelations over time 5:44. But the people themselves, after revelation and knowledge came to them, began to confuse the truth 42:14. At that point God could have judged between the people immidiately when corruption started apearing 41:45 but He has decreed that mankind shall bear the responsibility for straying away from the truth once it has reached them in its unaltered form 2:253, that there will be no compulsion in religion 2:256,18:29 that true believers in their revelations and seeking guidance will find the way to the straight path 2:213. This can be achieved first and foremost by the people of the book upholding the truth of their own scriptures. The corruption of past scriptures is a historical fact independant of what the Quran says, but their corruption is not absolute and neither does the Quran say so. This is precisely why the Quran refers to itself as the Muhaymin/Guardian of past scriptures. It guards what is still true in them, reveals what has been hidden or misintrepreted, exposes their most important falsehoods that are essential for the establishment of the true Faith, while disregarding many other such things

5:15"O followers of the Book! indeed Our Messenger has come to you making clear to you much of what you concealed of the Book and passing over much; indeed, there has come to you light and a clear Book from Allah. With it Allah guides him who will follow His pleasure into the ways of safety and brings them out of utter darkness into light by His will and guides them to the right path".

The position of the Quran is that at the time of the prophet, what was available of previous scriptures and traditions was an amalgam of truth and falsehood.  This principle is derived from a holistic understanding of the Quran. It says previous scriptures and traditions contain guidance and light. It also says they were physically and orally tampered with. And when it makes these 2 statements the Quran doesnt speak in absolute terms, that they are totally guiding or totally corrupt. This leaves the possibility for both statements to be true at the same time.

The reason for the protection of a revelation is linked to the discontinuation of the institution of prophethood after Muhammad. While the line of Prophethood was active, there was no need to protect the Scriptures as they were secondary compared to the current prophet's word of mouth. The current prophet's word was the primary source of God's religion, not the past scripture

35:24"and there is not a people but a warner has gone among them".

Each Prophet was always as reliable and as powerful an authority of God's laws as the previous. As no further prophet was to be sent to Mankind, it became crucial for the guidance of man, that the final Message be guarded intact by God Himself until the Final Day. Through the Quran referred to as the Reminder, Guardian, Criterion or Balance, all other scriptures are safely restored to their pristine originality and preserved through a divine pledge.

600 years had passed between Jesus and Muhammad, but that does not mean the people were left without any tools to discern the truth, which, as already said, was not completely blotted out from the past scriptures and traditions. God always grants respite to the people and allows them to choose their own path after receiving guidance. This is an ongoing process since the line of prophethood was initiated. Everytime corruption of a divine system appeared, prophets would eventually rise to reform the people. According to the judeo-christian belief for example, Malachi was the last of the minor prophets and 400 years later Jesus was sent to the Israelites in order to clear the falsehood of the Israelite elite

5:19"O followers of the Book! indeed Our Messenger has come to you explaining to you after a cessation of the (mission of the) messengers, lest you say: There came not to us a giver of good news or a warner, so indeed there has come to you a giver of good news and a warner; and Allah has power over all things".

Also, many prophets were sent to Israel to warn them of their disobedience but many were rejected, persecuted or killed as Jesus amply says in the NT and as corroborated in their own books. God surely was doing his job by sending Prophets until Muhammad to correct their lies and expose them. It just so happened that Israel was so degraded that the corrupt, even while prophets were busy preaching in their midst, always came back into power to manipulate the truth once again

2Kings17:13-14"And the Lord warned Israel and Judah through all prophets of all visions, saying, "Repent of your evil ways, and keep My commandments, My statutes, according to the entire Law that I commanded your forefathers, and that I sent to you through My servants, the prophets." But they did not heed, and they hardened their nape like the nape of their forefathers who did not believe in the Lord their God"

again in Zech1:3-4 or

Jer7:25-6"Since the day that your fathers came forth out of the land of Egypt until this day, I sent you all My servants the prophets, sending them day [after day] with every fresh morn. Yet they hearkened not to Me nor did they incline their ear, but stiffened their necks; they did worse than their fathers".

The prophets specifically targeted in the most harshful ways the elite, the ones supposed to be the upholders of the Torah, transmitters of true knowledge and guardians of piety, for their corruption to the core Jer8:8,Hosea4:6,Micah3:9,Zeph3:4etc, down to Jesus who perhaps used the most condemning words of reprove towards the religious leaders Matt23. In the time of Muhammad the transgressions of their leadership were equally pointed

5:62-63"And you will see many of them striving with one another to hasten in sin and exceeding the limits, and their eating of what is unlawfully acquired; certainly evil is that which they do. Why do not the learned men and the doctors of law prohibit them from their speaking of what is sinful and their eating of what is unlawfully acquired? Certainly evil is that which they work"

2:87"And most certainly We gave Musa the Book and We sent messengers after him one after another; and We gave Isa, the son of Marium, clear arguments and strengthened him with the holy spirit, What! whenever then a messenger came to you with that which your souls did not desire, you were insolent so you called some liars and some you slew".