I guess my point is that this goes for all countries. "Diplomats" are often not prosecuted or extradited for crimes committed abroad. It's not just the US that takes advantage of this system -- and I haven't even seen evidence that the US is an exception to the norm in this space. The "uses and abuses" section of the relevant page on Wikipedia has plenty of examples, and there are probably many more that don't make the news. It is not a novel thing and is basically irrelevant to whether Assange ought to be extradited.
How about a diplomats wife? They can clearly also escape extradition. It has nothing to do with what title you hold but if the US state gives a fuck or not.
> It has nothing to do with what title you hold but if the US state gives a fuck or not.
The US cares about US operatives because they have a job to do on behalf of the US. The operatives can't do their job if the host nation holds the prosecution of their spouse over their head. I think you may be under the false impression that the United States is unique in this regard but it's basic diplomacy as standardized by the Vienna Conventions on Diplomatic Relations [1] - Article 37 specifically.