“It’s a Commie thing. Just like the French communists did in 1945.”
It wasn’t a communist thing. That happened everywhere that was liberated from the Germans. In the Netherlands, France, Denmark, Norway, you name the place it happened.
Anni-Frid Lyngstad, of the group ABBA, was a child born from a Norwegian mother whose bed partner was a Sgt in the Wermacht. After the war Anni’s mother fled with her to Sweden in fear of reprisals against women who slept with German soldiers.
Such fraternization was a lot more common than the usual good war propaganda pretends. One West German Lufwaffe general had a French mother as a result of such a union. His mother went to the French sector of Germany as soon as she could and married her lieutenant. These post war unions were not uncommon.