Bullshit. Greek finances have been in the crapper sense before the American real estate and banking blowup. The only dirty US player involved was GS helping the Greeks lie to the rest of the Euro group. Their own fault for believing anything GS says.
They all fucked themselves. The volume of bad real estate bonds issued by America pales in comparison to the volume of bad government paper that has crufted up the system for decades. In any case national banks are big boys and are responsible for managing their own risk.
Like the German banks are currently doing with the Greek deadbeats.