The US controlled a lot of Social Democratic groups during the Cold War. Remember the European Left was overwhelmingly either Communist or Third Campist Socialists (non-Communist Marxists) in the first decade or two after WWII. Ever since then, the CIA boosted both Atlanticist Soc Dems and New Leftists, the latter perhaps being anti-American on the surface but undermining trade unions and socialist structures.
And now nearly every dumbass Western "progressive" thinks NATO is some holy defensive force and imperialism is somehow only something far lesser powers do.
Moreover, Stoltenberg´s DAD was a pro-NATO Defence and Foreign Minister.