If I read the articles correctly Google has no business relation with DigiNotar what so ever.
Also according to the public statement here: http://www.vasco.com/company/press_room/news_archive/2011...
"On July 19th 2011, DigiNotar detected an intrusion into its Certificate Authority (CA) infrastructure, which resulted in the fraudulent issuance of public key certificate requests for a number of domains, including Google.com. "
Then it continue:
"At that time, an external security audit concluded that all fraudulently issued certificates were revoked. Recently, it was discovered that at least one fraudulent certificate had not been revoked at the time."
I cannot believe a security audit did not notice that "Google" is not their customer! I think, the company did not profit well in SSL (Euro 100,000 in the same article), so from the business point of view it would have made sense to get some extra cache from an oil rich government to issue a fake certificate that is unlikely to be used against important people in free nations.
You are right, unfortunately some European companies are less eager to deny their profitable business with rouge governments. They even happily supply internet censorship, and satellite interferer technologies to Iranian government. Without considering much about the health implications those high energy devices have specially on children and pregnant women.
The irony is that Iranians cannot update their Google Chrome because of sanctions! Of course it is Internet and there are ways to get around that, specially for technical savvies . But you see how funny it can be :)