But they are not Russians, they are Jews.
However, there could be millions of high-educated Russians immigration, due to the huge difference in salary and perspectives, but EU/USA/Canada shut down borders specifically for white Russians long time ago, widely opening them for completely culturaly alien jews/turks/arabs/africans.
As far as I know, it is very hard to change citizenship for any white european person. F.e. you can't easily switch your citizenship from, say, USA to Sweden or vice versa if you are ordinary white person.
But they are not Russians, they are Jews.
However, there could be millions of high-educated Russians immigration, due to the huge difference in salary and perspectives, but EU/USA/Canada shut down borders specifically for white Russians long time ago, widely opening them for completely culturaly alien jews/turks/arabs/africans.