Again, very nice try splitting these up into parts. Can you give me one coherent explanation that accounts for everything I said simultaneously?

The fact you think Paul was the one saying this makes me think you are not familiar with what you read in 1 Corinthians 15. Paul did not say any of that, He said HE WAS PASSING TO THEM WHAT HE RECEIVED. it was a church oral creed regarding the gospel message, something that preceded Paul and His conversion.

Bible scholars date this creed anywhere from a couple months to less than a decade after the alleged resurrection of Jesus.

Paul was simply telling them as a matter of first principle he taught them that creed he received and that creed happened to include the fact there were loads of eyewitnesses of this resurrection of Jesus Christ that underpins the gospel message.

So the faith of the early church was rooted in a historical event that there were eye witnesses to. Of which Paul was one of many.

And for the record, it wasnt just Paul who said it. It was the other 3 gospel writers as well and the multiple unnamed eyewitnesses Luke interviewed in writing his gospel.

So again, what's your thesis on how belief in the resurrection of Jesus became a thing within the lifetime of eyewitnesses? And what is your one coherent explanation that accounts for all these cumulative historical facts?