Your post reminds me of Mel Gibson’s The Passion. Mel makes no cameo appearance in it except for a shot of his hands driving a nail into Jesus on the cross. I know Mel fell a great deal here on this forum when his antisemitic attitudes became known but clearly he felt this shot was meant to show it was he a sinner who ultimately was the cause of the passion of Christ.
I was actually thinking about that as I posted. I saw a quote by him at one time that was something to the effect of "I could not ask anyone else to do it. I imagine the experience was intense for him.