Again, you misconstrue me. I never said that potentiality = success. I said that potentiality was the ability to develop, achieve or succeed. That is not the same thing as success, although there can be no success without it.
This term 'human', verb or noun, is a moving goalpost: there is no universally recognisable line between what 'human' is and is not. It's fuzzy at best. It might seem clearly delineated in your mind, but that is entirely subjective - and the assumption that such a distinction exists has long been the source of undue suffering. The potentiality still before us (or within us) is the potentiality not to be or do 'human' but to be or do anything - it is limitless, because it is actualised not alone in ourselves but through our interaction and interconnection with the entire potentiality of the universe, absolute potentiality, God. What puts any perception of our 'humanity' in danger is to believe ourselves or others unchangeable, actualised, devoid of potentiality or limited by names and labels (I'm only human, she's just a girl, etc). We can make ourselves new with every moment, every interaction and every experience - we only have to see the potentiality around us.
They were all human. I think you might need to read the bible again, and check that you're not reading judgment into the text. Jesus did not judged the priest or the Levite, nor did he judge the Samaritan. He simply provided an opportunity to learn the answer to the question: "who is my neighbour?" We are the ones who have added the title 'The Good Samaritan', enabling judgement of the other passers by as 'not good'. The point of the story is to draw attention to our desire to label others, to judge them and perceive or assume limitations on their potentiality - not the potential to be 'good' or 'bad' (these terms were not applied by Jesus), but the unlimited potentiality to be other than or more than 'Samaritan', for instance - to be 'neighbour' - and to see potentiality in others - not just a Jew or a stranger, but a fellow human being in need of compassion and care - and interact accordingly. Jesus effectively turned the common judgements or prejudices of the time on their heads - the two men whose labels may imply goodness and righteousness did not act righteously, while the man whose label at the time implied enemy interacted as 'neighbour'.
Nor did Jesus judge the woman labelled and thereby condemned by the crowd as 'adulterer'. He already saw her potentiality beyond her 'sin'. He invited the crowd to see her as they see themselves (as more than their sin), and then told the 'woman' to recognise that potentiality and not define herself by past sins. And again, he did not judge the crowd either, but reiterated what was said in Luke: "Judge not, lest ye be judged." It is the crowd and the reader who judge here, not Jesus.
I would hope that anyone who interacts with such individuals, or even talks about them, would withhold any judgement, as is their responsibility as a compassionate human being. You probably think I'm being unrealistic to suggest this, given the way society (and indeed Christianity) operates to protect itself from danger or 'evil', and yet this is what Jesus did and what he taught. Sure, it takes courage - more than we have at times - but I would think that this is what we should strive for.
I acknowledge that it sounds rational, if that's what you mean by 'holds water'. I guess I also understand why you so strongly believe it - after all, it appears to govern our laws and our sense of safety - but I can't say I agree with your statement of this view. You make a distinction between what these actions do: they don't 'define us' (hopefully not?) yet they 'tell us who and what we are'? I don't see much of a distinction here. I accept that our actions, particularly consistent ones, may reflect a perception of who or what we were, but they have no bearing on who or what we are at this moment, unless we choose to interact with the 'self' in this way. Likewise in our interaction with others. As I said before, we can make ourselves new with every moment, every interaction and every experience, and in focusing on this instant and ever-present ability to change (not just the actual, perceived change over time), we can glimpse absolute potentiality, not just in ourselves, but in others and in all things.
It is a civilised society's right and responsibility to condemn Hitler's actions and stop them. But you cannot confidently say that anyone would not be Hitler if they had the exact same (not just similar) circumstances of birth, upbringing, education and life experiences. To dismiss Hitler's humanity is to dismiss the possibility of another human being coming to power, with the support of the people, whose view of the world is so limited or distorted that his subsequent words and actions could bring about so much pain, humiliation and loss - not to mention the possibility of millions of human beings agreeing with him, admiring him and facilitating his mission to 'make his nation great again'...oh, wait...
It seems that, for the most part, we continue to believe that we (and all the people we love, respect and associate ourselves with) are fundamentally different in our essential makeup to Hitler. We prefer to separate him out as some horrible anomaly - and yet it seems here we go again...
I think perhaps we're closer here. On the one hand we can be called 'human', but on the other hand we are so much more. We are given the entire universe and we can make it more. Too often, we only see the faults, the limitations. If the rock is not seen for what it can be (ie. potentiality recognised) then work cannot start: there is no further actualisation and therefore no movement, no change - only a rock and unseen potentiality (not nothing). Whether potentiality is seen or unseen, ignored or rationalised away, it is still there, and all things are still possible. The rock may just have to wait for someone more aware of potentiality to come along - they say beauty is in the eye of the beholder, after all.
If what is shaped is not possible (rather than what is possible not shaped), to me this is nothing - or rather, nothing but illusion. Here we delve into mathematics a little, because shape, movement and change can be reduced to mathematical equation. So if an equation cannot be solved, then it cannot be true, and therefore the hypothetical shape, movement or identifiable point seems impossible to graph, and you have nothing but a bunch of symbols that look like they mean something, but actually point to nothing - just an undefined space on a graph. This is what I think 'pure actuality' might look like without potentiality.
But then again, mathematics recognises potentiality even here: the ability of an equation to be solved, even if we never actually solve it. With things like imaginary numbers, it also recognises the significance of 'looking' beyond what is actual, to a potentiality that doesn't require interaction (observation) in order to be.
And I believe that our unlimited potential remains before us to facilitate the 'creation' of universal beauty and harmony out of the diversity of the unfolding universe, by recognising the oneness and potentiality, not of 'humanity', but of all matter.
Our interaction with the life, words and actions of Hitler as a human being, for instance, just as we interact with Jesus' story, enables us to recognise the falseness of perceived limitations and develop a greater awareness of this underlying ability to succeed: to achieve beauty and harmony from diversity. In this way Hitler's unlimited potential remains before him even 'after death'. Most of people just don't see it that way. So be it.