I don't trust what the clergy write

Perfect, because none of them was a clergyman:

1. Publius Cornelius Tacitus was famous Roman historian and politician
2. Mara bar Serapion was a stoic philosopher from the Roman province of Syria
3. Marcus Cornelius Fronto was a Roman grammarian, rhetorician and advocate
4. Lucian of Samosata was a Hellenized Syrian satirist, rhetorician and pamphleteer

And they independently wrote that: "Jesus was killed [all of them] by crucifixion [Fronto & Lucian]"

P.S. As I already wrote, I'm very sorry... :)