At the same time an EU country is deporting Russian scientists and banning them from the Schengen zone: https://meduza.io/en/feature/2025/04/14/sweden-s-security-se...
People spent a lot of the cold war guessing "is this person a defector or a double agent?", and I guess we're going back there. Similar things happen in the US, of course, both for Russians and Chinese people. And let's not forget the Russian tourists: https://en.wikipedia.org/wiki/Poisoning_of_Sergei_and_Yulia_...