Just take a look at American citizens who have been indoctrinated into Leftist ideology. They are most certainly willing to inflict cruel punishment on other Americans that they deem "useless eaters."
And look at the physicians that perform abortions and/or gender reassignment surgery on children.
As Peterson says, the capacity for insane cruelty is the rule for humans, not the exception.
This is the evil that explains the Fall of Man.
All that is required is for people who commit those inhuman crimes is the knowledge that they will probably not be held accountable.