I think that's the more accurate interpretation. They already know there is a God. That's why they spend all this time talking about him. They know he exists, but they are pissed off at him. They're mad because they don't want to submit to his Laws, and they know in the end they will be punished severely for it and they feel it's not fair. So they come on here to refute his existence and degrade him and his followers. Because they know they are completely condemned.

They are just like satan. satan will not submit to God and didn't want to obey him but he wanted to be his own god. And now he's pissed because he's condemned. So he goes around looking for mortal humans to corrupt. To get them to follow him and hate God's people and God himself. Is this the truth?