Thing is, forgiveness achieves cheating the wronged party out of their rightly deserved justice and recompense.
If you insist that “their” transgressions against humanity should be forgiven, all that does is created a whole planet full of angry and resentful people.
Why? Because by prioritizing forgiveness and mercy for “them”, you’re choosing to sacrifice humanity getting that which has been stolen from them. More forgiveness “they” receive, the less justice WE receive (forgiveness and justice are at opposite sides pulling at each other for priority).
Therefore the correct choice is maximum justice for the people. Restoration of stolen prosperity by confiscating ALL assets “they” ever obtained (even honest earned assests as further punishment).
This of course includes punishing “their” blood line too for after all, “Original Sin” when deconstructed is “Sins of The Father” taken to its logical conclusion. If religious doctrine is distorted, logically, punishment according to “their” lies would be perfectly karmic in terms of poetic justice, thus “Sins of the Father” is a valid way to punish “them”.