Islam critiqued seeks NT witnesses; reliable testimony of the Gospels?

In answer to the video "The Quran and History: Surah 4:157"

The NT shows in Matt26,Jn18 that the disciples did not witness anything but Jesus' arrest by the Romans, and among the disciples only Peter saw Jesus' questionning by the high priest at the courtyard. None of the disciples saw or were present at Jesus' alleged public beating, humiliation and crucifixion. While there is mention in Jn19:25-27 of a "disciple" being near Jesus at the cross, there is no proof that this unnamed disciple mentionned by John's Gospel's writer (mentionned in the 3rd person by the way, why would John mention himself in the 3rd person?) is John the son of Zebedee.

That traditional interpretation is still a matter of dispute among scholars. Also, the other gospels dont mention a

"disciple whom Jesus loved".

So, that "beloved disciple" who witnessed the crucifixion is the John who authored the gospel that holds his name, yet that "beloved disciple" fails to mention the spectacular transfiguration of Jesus, and the talking cloud, of which he was only 1 of 3 eyewitnesses Matt17:1-13,Mk9:2-13? That is not to mention that "beloved disciple"'s silence of other events of which he was the privileged eyewitness, leaving instead others who werent present to those events to testify in his place. Incidents such as the raising of Jairus' daughter Mk5:37-42 or Jesus' ascencion Lk24:33-51.

There are various theories on the identity of that unknown and unnamed male disciple "whom Jesus loved" that allegedly stood near Jesus on the cross. According to the NT, he was one of the unknown eyewitnesses who recounted the event to the several unknown writers of the Gospel of John, as attested by the text

Jn21:24"This is the disciple who testifies to these things and who wrote them down. We know that his testimony is true".

Who are "we" and who is the one whose testimony is believed to be true?

The NT sometimes speaks of "disciples" without them being necessarly those among his inner circle of 12. For example Paul says the resurrected Jesus firstly appeared to Peter then to the twelve 1Cor15:15 at a time when Judas was already dead Matt27:5, and his successor had not yet been chosen Acts1:26. The other Gospels also say nothing about any disciple or any women being near the cross, or talking with Jesus while he was on the cross. They only mention a group of women watching the scene from a distant place. Accepting this for argument's sake, unlike his male followers, these women would probably have been allowed to watch without being arrested, provided that they didnt try to interfere. Execution sites were guarded by Romans who would certainly not allow access to the followers and accomplices of one who was supposedly executed for being a political agitator that could threaten the state Matt27:37,Mk15:26,Lk23:38,Jn19:19-22. It isnt even known how Jesus - or any other victim of this brutal Roman execution method - was affixed to the cross.

The earliest artistic depictions of Jesus’ death were made centuries after the fact, long after the Roman Empire had turned Christian and outlawed this punishment. Also, there are very few archaeological remains of crucifixion as a practice in general. In fact the only known solid piece of physical evidence is a 1st century C.E. heel-bone pierced by a nail, found in 1968 in a Jewish tomb in Jerusalem. The piercing doesnt even follow the image of crucifixion made famous in Christian iconography.