What you failed to mention of course is the problems with the handful of references to christ (and even more rarely Jesus).
The fact that some lived long after Jesus supposedly lived, some were only to found in christian translations written long after the author had died. some were blatantly added to the original text.
So I have some serious doubts as to whether Jesus even existed, I have no doubt that even if he were real there is not a single shred of corroborating evidence that he resurrected and flew up to heaven.
The credibility of an ancient text depends entirely how many supernatural stories it tells.