> Did Britain allow tens of thousands of Nazi party members to emigrate to the UK during the Blitz?
England and the US definitely allowed Germans to move to the country before, during, and after the conflict - and plenty of them. You'd be grilled by authorities for sure, and probably observed for months afterwards, but that's it. And here you're equating members of a political party with people born in a certain country, which is not really fair.
> Should the Ukraine allow a million Russians to marry on Zoom and come live in Kiev?
Why not? They would see first-hand the result of misguided policies and likely support Ukrainian instances. Unless, of course, you think there is such thing as a "Ukrainian race" worth preserving...