I have all reasons to dislike Hitler and everybody in his gang. For they have destroyed not only my family life, but also the honor and reputation of country.Hitler and his followers have absolutely destroyed - to ripple effect- generations of families. Opa's hope is that humanity can rise to a new standard, a new way of being that no longer uses force in response, but creates a new process for peace.
He has some good arguments, that often the fall of one power by force creates space for another power of equal or greater oppression to fill. This is not new information, but we do often fail to remember it when we are angry and in hopes to retaliate a wrong done against us. We think that we can subdue with fear, when fear almost always creates a vacuum for revolt and abuse of power.
I appreciate that Opa recognizes that now that the US is at war, the focus must shift.
I do think that whether someone is a strict pacifist or a fervent believer in Just War, that most logical people can agree that war is not something we should strive for.
It is hard though, because we are such a broken world, with such complicated and messy webs of conflict, it seems it is impossible to achieve what we fantasize as "world peace." However, I hang my hat on Opa's conclusion, that the least we can do is try with "the principles of humility, helpfulness, truth, and love!"