The only contemporary account of Jesus was the Romans listing a Jesus as being executed for violent treason. I've come to the conclusion that there is an historical Jesus and His main mission was the overthrow of Roman power in His homeland. The Jewish lackey government was nearly as bad and had to go too. But He got caught and executed. His followers mostly did too, this was referred to as "martyred".Contemporary? It was a long time ago, we have demonstrably old accounts of Jesus, which is consistent for something that happened a long long time ago.
Paul started a new religion in His Name, which Jesus had nothing to do with.
Which is why there is essentially no records of Jesus outside The Legend. What He was really up to was a capital crime, according to the Romans.
The NT makes a lot more sense if you interpret "The Kingdom of God" as a Judean homeland free of pagan domination.
Tom