I'm from Italy, US cultural and military "colonization" (for lack of a better word) has been quite bad here
And the diplomat case is not proof of a one-sided extradition treaty; it's entirely separate from the issue of extradition. The diplomat's wife had diplomatic immunity, and therefore would have been immune to prosecution whether or not she remained in the UK. The UK had to change its laws to make criminal prosecution of her possible. Under US law, you cannot retroactively place someone under threat of criminal prosecution, so even though diplomatic immunity has been modified since then (and if the hit-and-run occurred today, she would be subject to criminal prosecution in the UK), the US probably could not legally extradite her.
The US has acted dishonourably in this case.
The agreement provided traditional diplomatic immunity[1] to personnel stationed at the base and their families but only waived criminal immunity for personnel for acts outside of the course of their duties. This waiver didn't extend to their families, because not being personnel, all of their acts would be outside the course of their duties and it would render their immunity meaningless.
This year, they changed that immunity so it no longer applies to family members, meaning they no longer have immunity. It was not made retroactive because the US would not agree to that (ex post facto criminalization is allowed in the UK).
[1] Diplomats usually refer to this type of immunity as "special immunity" because it is not related to the performance of diplomatic functions.
Extradition of U.S. Diplomat’s Wife Sought in U.K. Teen’s Death https://www.bloomberg.com/news/articles/2020-05-11/extraditi...
also the way US treats its prison population and allows torture (enhanced interrogation) doesn't make it better than any other banana republic. It's in no way better than China. it just has more effective propaganda.