Dude, no one is questioning that the Apostles were martyred. But that has jack-shit to do with whether or not the resurrection occured.
Son, I am a professional historian. And I can tell you without a bit of doubt that no reliable historian would make such incredible claims based solely on one source.
I don’t know any historians who accept the “empty tomb” because there’s nothing outside the gospels to suggest that it happened. True scholars do not accept a single source as the whole truth without external evidence. (Please try to realize that there is a difference between Christian scholars and secular historians.)
Let’s say I found a diary in which the writer claimed that he had been at Ford’s Theater the night Lincoln was shot, and the writer claimed that he had personally witnessed Mary Lincoln shoot her husband and then frame John Wilkes Booth. In the margin, the writer’s sister and brother write in that they saw it, too.
No real historian would then say that we should toss out 100 + years of Lincoln scholarship based on this single source. What a real historian would do was test the paper and ink to see if it was of the proper time period, read it carefully to see that all wording was contempoary (that the writer didn’t use any words or phrases not in use at the time) and then settle down to researching who the writer was. Is there any evidence the writer was actually at Ford’s Theater? Did he know any of the players in the story. (He’d lose a lot of credibility if it turned out he was JWB’s best friend and had made a fortune travelling the country to plug a book of his theories.)
If nothing external could be found to support the diary’s authenticity, historians would probably quietly set it aside and dismiss it as the ravings of a kook, or someone who had a vested interest.
Nearly every religion is founded on a supernatural event that the believers swear happened. A billion Muslims would swear that Mohammed ascended into heaven from a stone, and they have the very stone from which he supposedly left. Sure Paul would point to this incredible event as reason to believe, just as the believers in Mohammed would point to their holy stone.
Yeah, it’s called political upheval, which is a great time for cults to flourish. When people are scared, they want something external to rely upon, and religion neatly fills that void. That a particular cult managed to gain more popularity than others means nothing other than the cult offered something that people liked at the time. Christianity has undergone massive changes in the time since it began-- it’s not always been the religion you see today.
As a historian, I conclude from the evidence that there was a man named Jesus who called himself the Christ, and managed to gather a following in his lifetime which expanded after his death. There’s evidence for that, but not much else.