That is what I just said. The basis of Christian theology is: His ethical teachings (historical), his death (historical), his resurrection (reported by eyewitnesses, but open to question).
So, despite you having no documented first-hand accounts of Jesus, you nonetheless are the omniscient authority who declares what is historical and what is not. I get it.
I think [the apostles] genuinely believed they saw Jesus after he died, although I have my own medical and biological theories about that.
Nope. You don't have any of your own original theories. You probably have some omniscience-fallacy delusions based on what others have written on the internet.
I base my interpretation on the evidence:
Nope. You never use evidence. You use whatever kooky crap you read off the internet. You have no first-hand evidence of Jesus, yet you pretend that you have overwhelming reams of evidence.
The written record indicates the resurrection is not a later legend added to the New Testament.
There is no such thing as either
the global climate (singular) or
the written record (singular). The earth has millions of climates and many millions of written records.
Of which written record are you speaking?
the earliest reports of the resurrection go all the way back to the eyewitness and are reported in Corinthians and Mark.
So the big question is why were the Romans (who executed Jesus) not totally abuzz with first-hand accounts of the amazing resurrection of the guy they killed? Romans did that, i.e. document everything. If they had executed someone who then returned to life, there would have been more coverage by the Romans than CNN devotes to Trump. However, nobody has anything. No first-hand accounts.
Does that mean that it did not happen. Nope. That's not what it means. It means that one will not find any evidence of historicity and must have faith to believe that it happened.
The fact that the apostles were willing to die and be executed for their belief they had seen Jesus after his death does not make it sound like a tale they conspired to fabricate while drinking carafes of wine at a tavern.
It is not a fact. The non-historical account of the apostles dying for their beliefs also requires faith to believe because it too has no first-hand documentary support.
My rational explanation is that Jesus did not die on the cross.
Your irrational explanation is devoid of any first-hand evidentiary support.