No example to the extent of purity that you are demandingdo you have an example. a period in history of christian remorse for their sins - sinner.
Christians are individuels as well members of a religion
Yes the Church has committed atrocities over the past 1600 years
But I prefer self-aware people of faith even if imperfect to godless libs who are incapable if feeling regret or guilt
Trump always said he never had regrets or guilt nor did he ever apologize.