This also assumes that this is information that Snowden wouldn't release anyway and that someone cares about. True or not, the perception by those who believe that he jeopardized national security is almost certainly that he's likely to leak whatever he can.

If he really things this is what's going to keep him safe, he's over playing his hand.

Furthermore, I think he's deluding himself if he thinks he's actually going to be targeted for assassination by the US. I'm no Obama fan, but it's a little far fetched. Shoved in jail, maybe. Killed to silence him? Nah.. that's a strategy ironically more likely to be employed by the countries he's seeking asylum status from.