The majority of Germans is completely biased towards Zionism because of their history, so it's more of a cultural than a personal thing.

This is well known, but isn't this exactly what you ask of a great thinker, to be able to transcend the biases of the culture and provide clarity and guidance? (Though of course at that age is hard to expect much from anyone).

Berlin perspective: It really doesn't feel that way. Germany's official political stance is very much "pro-Israel" and somewhat intentionally deaf and blind towards what is happening in Palestine (though not completely). Public opinion and discourse is much more nuanced though.

No we are not. 80% of us are against what Israel does in Palestine. But the Goverment and media will tell you otherwise. It's got nothing to do with our history. Konrad Adenauer--first chancellor--once said:

"The power of the Jews even today, especially in America, should not be underestimated. And therefore I have very deliberately and very consciously — and that was always my opinion — put all my strength, the best I could, to bring about a reconciliation between the Jewish people and the German people."

It was never about guilt, still is not. Germany has learned nothing from its past.