I didn't interpret knowtheory's comment as implying that German bank's were solely responsible, but I can see how you could make that interpretation.
However, I can't provide direct quantitative information on the quality of the loans summarised by those numbers. Lewis (who seems credible to me) gives accounts of how German banks appear basically to have been taken advantage of (hence the "stupid money" comment) as customers for particularly ill-advised investments.
> Lewis (who seems credible to me) gives accounts of how German banks appear basically to have been taken advantage of (hence the "stupid money" comment) as customers for particularly ill-advised investments.
That part of the story is correct, IMHO. There are a lot of stories around it.
http://www.haver.com/comment/comment.html?c=120604b.html
[NB Germany doesn't have the largest exposure to Spanish banks - US banks do]