[ogurechny]

International politics are fake. There is a gentleman's agreement that secret services can kill “traitors” and “enemies” anywhere as long as no one objects (or the objecting country is not important enough anyway). The hirelings get the fake documents that are perfectly known to the officials to be the token of non-diplomatic immunity, and also allow them to pretend they were once again fooled by the bad foreign state. In Skripal case, killers spent the day before waiting for some agents to appear at the location to tell them to go sightseeing somewhere else. Nothing happened = UK was OK with what they were doing. Only after the fact British officials started to create a scene, and what they were worried about most was the fact that Russian officials have sold the “special” passports to way too many “irrelevant” thugs and oligarchs who wanted to be untouchable when travelling abroad (hence the leak of the existence of those passports, and silent confirmation that they were respected by so-called free and lawful countries).

You need to understand that those “above” are dumb bureaucrats playing dumb bureaucratic games. This is how societal selection works in current historical period.

As for this case, Kadyrov (or his inner circle) is known to be emo about any critic, and has been successfully killing the Chechen refugees in Europe for decades now. Ukrainians also seem to operate freely, which is a bit ironic when you remember that Ukrainian agents were taught in the same secret military schools Russian agents graduated from, and that Ukrainian oligarchs have mansions on Côte d'Azur and similar places right next to mansions of Russian oligarchs. I sometimes worry about their travel logistics in such complex times. Poor creatures!