This is not addressed to me, but I have a comment:
I consider myself pretty knowledgeable in general history and geo-politics of the 20ieth Century, but your comment made me research a bit further and I never notice the SS were apart form the Nazi military. I mean, I knew the SS started as paramilitary, but I figured they had merged with the military after. Conclusion is I was wrong, the SS really always were a disgusting ideological group. So yeah, in this case Oskar Groening doesn't seem like he was as forced as some make it out to be.
Yeah, the SS were just a racially motivated branch of the government that had many subsections from police, detection, intelligence, camp management, racial policy, army, etc. I think a lot of people don't realize that being SS was less about military and more about ideology and you could become SS pretty easily. You just needed hate, drive, and a little skill.
Dude walked right into a hate club, participated, didn't like the death (but didn't care as long as he wasn't part of it), and doesn't seem remorseful at all.
He could say whatever he wants, he just wanted to make sure people didn't forget what he participated in.