> And why limit yourself to NSA whistleblowers, a government that has crossed this line has crossed that line in general, not just for some class.
Because the claim isn't that "the USA has tortured people". The claim is that the USA will torture Snowden. Given the wide disparity in justice systems utilized for U.S. citizens, "enemy combatants", and U.S. military, you have to at least make that broad type of distinction to evaluate the probability of the claim that Snowden will be tortured if he returns.
There's no end to the things you can do or refuse to do if your only justification for that action (or lack thereof) is that a government has, at some time, tortured somebody somewhere.
I agree wholeheartedly that the U.S. needs to account for instances where they torture, but that also doesn't completely invalidate the whole government.