Islam critiqued walks by faith; evidences for the resurrection?

In answer to the video "Muslims' Worst anti-Christian Polemics: Corruption of the New Testament"

As Paul candidly admits,

1Corin15:17"If Christ has not been raised, your faith is futile and you are still in your sins".

In essence, the validity of Christianity stands or falls on this claim. Yet the admittedly crucial nature of that event is contrasted by the scarcity of material related to it within the Gospels. Barely 5 people witnessed the risen Jesus, and when analyzed critically, these testimonies are contradictory and inconsistent. In Mark, Matthew and Luke, Jesus' message is centred not on the resurrection, but on the establishment of God's kingdom on earth, a metonym in those days for God's rule of justice and restauration of JEwish glory among the nations, with the defeat of the Romans.

It is only with the development of Christology with John's Gospel and Paul's writings, as well as the Greek Church fathers, their rich Hellenistic background of mythologies and legends of deified leaders, that supplied the fertile ground for the short story of Jesus' resurrection, his interpolated deification. This Hellenistic perspective however isnt on par with the Jewish background which the writers and early Christian scholars claim provide proof for their beliefs on Jesus. In Jewish understanding, the resurrection of the dead is a common theme that has already occured in the past and that shall happen again in the messianic era, without any divine connotation or connection with atonement for sins.

These men were formulating their ideas, interpreting inherited traditions while still infused with stories of demigods, Achilles, Dionysus or Heracles to name but a few. By the time they expressed their thoughts and the Gospels were put to writing, the Jerusalem Temple had been destroyed in 70CE, and the centers of Christian thought were spread around the Mediterranean. This opened the way for non-Jews and foreigners to Jesus' socio/cultural/religious background to take the reigns of power in the early church.

When challenged by the Pharisees to display a miracle, Jesus promised them his resurrection after being dead for 3 days Matt12:39. Once he is supposedly resurrected, he doesnt appear to those who specifically asked him for the sign and to whom he said he will reappear. Instead, Jesus' followers come to the Pharisees, claiming that the sign had occured. Neither is there any claim that the risen Jesus ever appeared to anyone but believers. There is only the word of a mere handful of "witnesses" whose stories vary from person to person, and we dont even know who transmitted those biased accounts until they were eventually put to writing by scribes whom nobody knows.

Matt12:40"For as Jonah was three days and three nights in the belly of a huge fish, so the Son of Man will be three days and three nights in the heart of the earth".

Here are the verses from the book of Jonah

1:17,2:1,2"Now the Lord had prepared a great fish to swallow up Jonah. And Jonah was in the belly of the fish three days and three nights. Then Jonah prayed unto the Lord his God out of the fish's belly. And said, l cried by reason of mine affliction unto the Lord, and he heard me; out of the belly of hell cried I, and thou heardest, my voice".

In Jn19:42 it says Jesus was crucified on friday or "good friday". All Gospels agree he was burried the same day and resurrected 3 days later on Sunday Lk9:22,18:33,24:45-46,Matt16,Mk8:31,10:34,Jn20:1. Yet according to Matt28:1,Mk16:2,Lk24:1 the various characters found the tomb empty in the early hours of sunday morning meaning he spent a maximum of 3days and 2nights in the ground; friday afternoon (1day), friday night (1night), all of saturday (1day/1night), sunday morning (1day). Also, contrary to the other Gospels, Jn20:1 states Jesus rose before the dawn of sunday meaning he was buried for maximum 2 days and 2 nights; friday afternoon (1day), friday night (1night), all of saturday (1day/1night).

Besides this discrepancy between John and the other Gospels, if there is one thing all Gospels agree on is that Jesus' alleged prophecy was never fulfilled. Neither did he appear to those opponents to whom he pledged that he would, neither did he perform the miracle in the manner promised. It is interesting to note that in the Quran, one of the marks by which to recognize a false deity is inability and ignorance to control the process of resurrection 

16:20-1"Those beings that some people invoke beside God cannot create anything; they themselves are created. They are dead, not living, and they do not know when they will be raised back to life".

Christians often disregard the first difficulty, that Jesus failed appearing to the Pharisees, focusing instead on the problem of not agreeing with the sign of Jonah due to the difference between a Jewish and regular day. The difference between a Jewish day and a regular day is the time when the day starts and ends. Jewish people considered the start and end of a day at sunset, whereas now we consider midnight to be the start and end of a day. There is no difference in the length of the day, and accepting the Jewish day would only make things worse as far as the sign of Jonah goes. And while it is true that according to Jewish law part of the day is equivalent to a full day, in Matt12:40 Jesus promised to be buried for 3 days and 3 nights meaning his time in the earth must include either all 3 days/3 nights, or can be deficient in only parts of a day or night, **but never of a full segment of day or night**.

In other words although he did not have to be buried for the entire 72hours, Jesus had at least to be burried on parts of 3days/3nights, which he failed according to all Gospels.