I've encountered very little ignorance of the irony; rather, I thought it was generally understood that Snowden's presence is tolerated out of political expedience (and as a bargaining chip) rather than any lofty ideals.
"I don't say this very often but I don't think people are as dumb as you think they are. People who think Snowden is a traitor would feel the same if he were in Iceland or something right now."
