Calling it a shift isn't accurate at least for sweden, i'd more say that the right has become more extreme.
To the point that even other right wingers keep having to tell the far right party to knock it down a peg, or just straight up fuck off.

The social democrats have sat quite stably at above 30% of the votes for a long while now, and nowadays the 4th largest party is the Left Party which is explicitly socialist.
And in the EU elections the Greens got third place, over the far right party.