He's not a US citizen, he was outside the USA. So what?
If we tried to arrest every person outside the USA who is trying to do something to/in the USA we'd have to put out arrest warrants for millions of people. We'd be, and are, the laughingstock of the diplomatic world.
Aside: we apparently assassinate hundreds of individuals outside the USA every year (something that Obama complained about IIRC ) with God-knows-what justification. We're well on our way down the Road to Ruin.
I'm hardly a bleeding-heart, but for the USA intelligence agencies to dog Assange to death is immoral, unethical and illegal even under our legal system.
Pursuing Assange is the worst of all causes: a fishing expedition, a routine overextension of international and national law, legal malpractice, and a giant fool's errand for every man involved in this.
Only a psychopath would put the pursuit of Assange on their resume. Of course we likely have plenty of those working for us. Apparently they float to the top, like shit.
jollybean says>"I think your comment implies an general ignorance of the situation."
Nope. But your reasoning above amply demonstrates a bit of how the powers-that-be twist language, logic and reason to justify contemptible behavior and justify crushing an individual. You should write an "Anti-Declaration of Independence" for spies that outlines their grievances against free agents and how they should be able to kill/maim/wound/harm anyone, anywhere just b/c they are irritated with those agents' behavior.
An honest leader would publicly fire with malice every asshole who participated in or encouraged this shitfest and make sure the government never employed them again. Of course, that would be a bit (but only a bit) similar to doing to them what is being done to Assange! Perhaps that would be justice. I'll have to think about it.