I hope what you are saying is true, although we ought to be careful that sometimes we assume that some things are true just because that is how we want reality to be, but it might be only an illusion, a tale we need to tell ourselves because the truth is too hard to confront.
I want to believe what you are saying too because I just can't stand thinking about the possibility that all these people died for no purpose.
More generally, I believe that there is a world to come in which there is true justice, because otherwise life just doesn't make sense.
However, if you worry about how to prevent a genocide from happening again, I suppose you agree that it is essential for Jews to make sure they keep up a well-equipped, well-trained and disciplined army, with a good strategy and a fierce determination to survive.
On your first point, that is the definition of faith. After the shoah an israel was born and still survives despite the odds. So because of that, I have faith in Gd an invisible "beyond" that a rationalist humanist can't prove His existence. Heaven and moshiach are the other two which I used to struggle with. But without those two, this world spiritually makes no sense.
And yes, have to be smart and well equipped to have a strong army. But guess what? We're still out numbered. Still need torah. Still need Hashem with that equipment. We need to survive, right? We have to fight for something other than surviving. Aren't we a people? But what is our nation? we aren't a race. I culture came from somewhere. It's the only thing that works for us because when we dio something differently that isn't our culture we end up like the 6 million who perished or like the slaves of egypt or the jews of persia, or what could be coming our way in america.
in our little brains in our little made up world we have no foresight. But with torah we have hindsight to help our people and ourselves for the future.