LOL, "espionage", "treason", "foreign spy". Good luck getting him extradited to a country that still has a federal death penalty for such offenses, guys.
Who said anything about extradition? There are plenty of ways governments deal with foreign spies, many times not by hauling them into court.
So you're advocating assassination?
Uh, that or GITMOesque living quarters...
It'd be pretty funny to see the U.S. invade Sweden to capture one of its residents and drag him to Gitmo...
Well, funny for crazy right-wing "patriots", of course.