Nigel,
No offense intended with my "Ivory Tower" comment, though my suspicions of it remain intact.
I know of Bonhoeffer only through the film of that name, which is one of my favorite films. That and
Sophie Scholl, The Final Days. Bonhoeffer and Sophie (and her brother and friend who were also executed) are true heroes. Paradigms of true courage. And they didn't resort to smashing things and setting fires, like those people who got way too carried away at Berkeley.
**
To all and sundry, this might be of interest to some of you, but no doubt some of you will hate it:
https://www.youtube.com/watch?v=Tq86Beh3T70