Doesn't matter. Still have Jewish origins and still the same prophets.
It hasn't been debunked. In fact, many Christian and Jewish scholars have embraced Islam because of this particular verse. Why do you think Jews were living in Medina before Islam? Because they knew a prophet would come to the mountain of Sela. If you bring up the Christians interpretation that disagree with Muhammed prophethood then it doesn't mean it has been debunked because actually these arguments Christians bring up has also been countered with other verses that contradict their claims.
Let's not forget the big elephant in the room where prophet Muhammed (PBUH) made so many prophecies that came into reality. That easily testifies his prophethood.
Like the conquest of Constantinople, Islamic globalization, airplanes, phones, cars, space technology, in the far east the nomads (Turk cousins) will establish the largest contiguous land empire in history and in the far west an island will establish the largest empire in history. Turks will rule Arabs and oil will be the new gold. The Arabs will be competing with each other to make the tallest buildings in the world which we are seeing today.
So many prophecies Muhammed (PBUH) made that came true and you'll find many scholars from different time periods literally recording all of the prohpecies the prophet made which tells you no doubt that he is the true prophet.
«So here is the issue that needs to be clarified:Many people use the abbreviation “SAW,” “SAWS,” or “PBUH” to fulfill this obligation in their writing. Is this something that fulfills the obligation of sending the salaah and salaam on the Messenger? Let us look now to some of the statements of the scholars regarding this practice. The Permanent Committee of Scholars in Saudi Arabia headed by ‘Abdul-‘Azeez ibn ‘Abdillaah ibn Baaz issued the following verdict when asked about the validity of abbreviating the salaah on the Prophet (sallallaahu ‘alayhe wa sallam): “The Sunnah is to write the entire phrase “sallallaahu ‘alayhe wa sallam,” since it is a kind of supplication, and supplication is worship, (in one’s writing) just as it is in one’s speech. So to abbreviate it using the letter SAAD or the word SAAD-LAAM-‘AYN-MEEM is not a supplication nor is it worship, whether it occurs in speech or writing. For this reason, this abbreviation was not used by the the first three generations, those that the Prophet (sallallaahu ‘alayhe wa sallam) testified to their goodness.” [8] “SAAD” and “SAAD-LAAM-‘AYN-MEEM” are often used in some Arabic books. The English equivalents of these abbreviations would be: SAW, SAWS, SAAWS, PBUH, and the likes. Al-Fayrooz-Abaadee said, “It is not appropriate to use symbols or abbreviations to refer to salaah and salaam, as some of the lazy ones do, as well as some ignorant people and even some students of knowledge – they write ‘SAAD-LAAM-‘AYN-MEEM’ instead of writing ‘sallallaahu ‘alayhe wa sallam.'” [9] Ahmad Shaakir said, “It is the absurd tradition of some of the later generations that they abbreviate the writing of ‘sallallaahu ‘alayhe wa sallam.'” [10] Wasee Allaah ‘Abbaas said, “It is not permissible to abbreviate the salaams in general in one’s writing, just as it is not permissible to abbreviate the salaah and salaam on the Prophet (sallallaahu ‘alayhe wa sallam). It is also not permissible to abbreviate either of these in one’s speech.” [11] And Allaah knows best. May the most perfect and complete salaah and salaam be upon our beloved Messenger, and upon his noble family and companions.»
FOOTNOTES
[1] written by Moosaa Richardson