Philosophical insights and methods can be used for politics of any color.

I do agree that its wrong to say that Habermas would be responsible(!) for any of that though. As if thinking up stuff would make you responsible for the misuse of those ideas down the road.

That is, I could see that the idea of a society of two could be derived from a society of one in that I could extend my desire to be kind to my past, present, and future selves, to a desire to be kind to selves that are not my own.

Kind of like a computing network being a generalisation of the network that exists inside anyone one machine in that networking is just i/o with more steps and more wire?

"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.

That reduces empathy towards other Muslims quite significantly.