Bonheoffer was a Lutheran pastor. Nietzsche, the son of a Lutheran pastor: 'In individuals, insanity is rare; but in groups, parties, nations and epochs, it is the rule.'
I'm not completely sure the point you are intending to make, but yes - there is a reason why so many great German thinkers were Lutheran or had Lutheran ties. It is exemplified by Luther's Table Talks at the pfarrhaus. Basically, it was a regular activity to gather at the pastor's house and debate / discuss / philosophize. Thus this became part of the culture.
Interesting, thanks. I want to know more about Lutherism, if you have any suggestions? As for my point, I'm not 100% sure there was one, except that it's nice to observe a theologian having common ground with the antichrist himself.