Only if there are consequences. If you get caught killing another country's spies or otherwise behaving badly, they may retaliate and kill yours. They may invoke treaties or launch ICJ cases. If they have leverage, they may use it.
Ecuador has no leverage.
> Assassinating political dissidents is also part of that game, so shouldn't we be angry at Russia?
They were Russian agents killing Russians defectors. That's an egregious violation, but they were ultimately taking care of their own. Wanna be a dissident, fine -- play dangerous games, win dangerous prizes. These killing also got a lot of attention because 1) they involved polonium / radiation poisoning, which is a particularly ruthless way of killing someone, and 2) they were in the western media.
All of the people the CIA or MI6 had shot in response didn't get any airtime...
> They just did their job, did they?
Moral arguments notwithstanding, this is just another day in the spy game. I would take years of cloak and dagger casualties over another Iraq, or Vietnam, or a World War. Geopolitics gonna geopoltic.
