What he did wasn't a 'mistake', what he did was wrong.
well, of course. But as Jesus said when those guys were mocking Mary M. for being a prostitute
“he who is without sin cast the first stone”
Yes what he did was a disgrace. I can’t imagine doing that to my wife. its disgusting. but you know what ? Jesus walked among some filthly characters and some of them became his disciples. A 2nd chance is a good thing.