DP is repeatedly arguing that Russell’s fate isn’t sealed, and that he doesn’t have to become the killer that slays Cable’s family.
Firefist before he grows up to become a mass murderer, but the former doesn’t see it that way.
Specifically, the latter believes that he has to kill Russell a.k.a.
He winds up being correct, as his own sacrifice play lets the young kid see goodness in humanity… but that’s exactly why his 180 turn on the issue doesn’t make a ton of sense when it comes to Adolf Hitler.