On frogs, resistance and terrorism

I have just finished listening to the beautiful and powerful song written about a soldier of polish resistance leaving his beloved to join partisans fighting German occupier. These men knew very well they faced almost a certain death. They lived the life full of danger, appearing from nowhere and dissolving in the night, fighting the enemy army, knowing full well that the British and French are not coming. We remember them, we salut them, we teach our children to remember them as heroes, we lit the candles in churches for them, we lit the candles in cemeteries knowing that many never had a Christian burial. They fought and they fell, and if they didn’t fell their fate was often worse in the hands of the German.
Please can someone tell me how, somehow, fight of men wanting to get rid of aggressor from their soil is different in Middle East than it was in Poland 60 years ago, how can we consider those who want to protect their land and their families and their livelihoods as terrorists? How and where did we get brainwashed into thinking that resistance to the ruthless aggressor is somehow wrong. And talking of wrongs - I do not believe and I never condone attacks on civilians. But It is grotesque to accept and to accept without thinking the preposition that just because people fight dirty their fight, their resistance, their sacrifice is invalid, is all criminal., is all terrorism.
How do we arrive at the stage that we are indifferent to this desperate injustice going on under our own noses and in front of our own eyes. Is this how Germany let fascists to lead them to despise Jews so much that their fate was not worth putting oneself in danger.
I am sure that this belief in Jews and Gipsies and handicapped as somehow subhuman did not happened overnight. There must have been a gradual process of the whole society deciding that they are superior to other groups of fellow human beings. How did this gradual process occur? Did it start with Cristalnacht and with sense that one can destroy other people’s property without consequences? Did it followed that as those people had less right to the justice they did not deserve justice? Did it followed that as society stayed indifferent to their fate the perpetrators were not really doing anything reprehensible? Did it follow that these “people” were not really same as us and as such did not deserve the society’s protection. Can you see how easy it is? Those people becoming those “people” becoming those dirty scum becoming vermin to be exterminated? It didn’t take Germans long to make this journey. Are we, civilized as we are, becoming de-sensitised to the tragedy unfolding in front of our eyes? By awarding some people right to kill others with impunity, while standing idly by, are we awarding a different “intrinsic” value to different groups in Lebanon, Palestine, Israel - are we on a slippery slope walked by our German friends 70-plus years ago?
I always wondered what it was like to have humanity sucked out of you in pre-was Germany. Did people notice? Or was it like that frog, that put in the pan of cold water does not try to escape when cooked alive?