They'll never say that Vatican II is in error, or they'll lose their positions, their income source, their customers. So, they have to come up with something to say, they re-invent the wheel.
Dimond should have just asked them if a 3 times married Eastern Orthodox (they can marry 3 times in the EO religion) that comes out of a confessional (confessing their sins to a EO priest) and dies, does he go to hell?
One is either in the Church or they are not, if that EO is in the Church he is saved, if he is not then he is damned.
Do you believe every single EO, without exception, is "Outside the Church?" Why or why not?
I think the answer to your question would be, if they knew what they were doing is wrong and did it anyway, they'd be damned. Even if they didn't know it was wrong, they could be damned for something else that they knew. But we don't know for sure.