But don't think for a second that the US won't force a diplomat's plane to land even outside their jurisdiction just because they believe an enemy of the state is on it. It's all about interests.
They already did that. It's funny that this is considered ok.
EU countries like Spain and Italy denied access to their airspace to a diplomatic flight in what was essentially equally immoral stunt as the one Belarus pulled. Only with the added "bonus" of showing that being a diplomat means nothing. Now the same countries have to walk the fine line of accusing the enemy while not incriminating the frenemy.
https://en.wikipedia.org/wiki/Evo_Morales_grounding_incident
Nitpick: Snowden chose to live in South America actually (Bolivia or Equador) he was just in transit in Moscow but he was just never given the right to onboard the plane again after the US canceled his passport.
This is objectively false, since there are way more refugees chosing to go to Russia and its allies (Snowden and who else?) than the other way round (thousands every year).