By saying CDOs I meant their ratings. And while, as always, nothing can be proven on Wall Street, you won't tell me that giving mortgages to unemployed people and then selling it as CDOs (or even CDOs squared!) is good.
I made no claims to good or bad, of course the crash wasn't good, but the chain of proof isn't there for the financial crisis in the same way. I'm simply talking about provable fraud that needed to take place up the chain at VW, which, when you're talking about an engineered machine with clear trails of who's done what and multiple decision points over iterations of industrial components, it's much easier to follow to the source and prosecute accordingly.