Forgiving Hitler (For Example)

If ACIM is right, then we should forgive even the worst kind of people (e.g. Paedophiles, Serial Killers, Hitler). And if anyone were to be left out of forgiveness then the most basic premise of ACIM is untenable, and the whole thing would seem to fall apart. There can be no exceptions.

So, taking Hitler as an example, now that he is dead and not actively exterminating others, it's conceivable to say 'well Hitler's views and behaviours must have grown out of a lifetime of traumatic experiences and emotional abuse'. Let's call that, in ACIM terms, 'a lack of love'. And, from that perspective, it's conceivable that we could forgive Hitler now that he is dead and harmless.

But, supposing we step back in time it gets a lot more difficult: ACIM rules out any kind of attack as being unjustified. But, let's imagine we're back in the second world war, and we know about Hitler's 'final solution' and death camps. I (or you) find yourself armed and standing in front of Hitler. All human logic says we should kill him to prevent the death and needless suffering of millions more people. However, ACIM says attack is never justified. Moreover, it seems to imply that, not only should we not kill him, we should forgive him for what he's doing, and behave only lovingly towards him....

Even, at a less personal level, organising an army to fight Hitler and win the second world war is undeniably a form of 'attack' and therefore not justifiable according to ACIM, however an unresisted Hitler would now be running Europe and probably the rest of the world, his genocide would be complete...

ACIM states that this world is not real and only things created by God or in alignment with his will exist. But how do you explain this to jewish child in a death camp waiting to be sent to the gas chambers? Their misery seems to exist.

Can anyone help me with this conundrum? Do we just let the bad people do their stuff and respond to it lovingly (I mean I know that's what Jesus did on the cross)? But this would mean anyone believing ACIM allowing death, suffering and despair to fall upon themselves and their loved ones without any resistance?