:::: "Forgive who?" Forgive the individuals responsible - and by extension, if this can be forgiven, then any sin can be forgiven.  Whoever thinks that Jesus was forgiving his Roman tormentors, but not asking for forgiveness for his Jewish opponents, he is outside of the Christian Tradition in thinking this - as Christians understand their own tradition.  Nothing's stopping you from putting your own spin on things, but that is not Tradition that's teaching you to think that way.  Any Christian that doesn't concede that Jesus was Jewish is willfully ignorant.