Persecution of Germans
The organised persecution of ethnic Germans, called "World War II traitors hunt" by the Soviet regime and their puppet states, refers to the brutal organised persecution of people that either were listed as Volksdeutsche or listed by Soviets and their puppets as "collaborators" and therefore were allegedly helping Germany in achieving its WW2 goals. The alleged traitors (and the bulk of the German nation) were treated with moral contempt.
Soviet Union
In general, alleged German collaborators (and other ethnic Germans) were imprisoned in Gulag concentration camps.
Poland
In Poland the status of Volksdeutsche had many privileges but one big disadvantage: Volksdeutsche were conscripted into the German army. The Volksliste had 4 categories. No. 1 and No. 2 were considered ethnic Germans, while No. 3 and No. 4 were ethnic Poles that signed the Volksliste. No. 1 and No. 2 in the Polish areas re-annexed by Germany numbered ~1,000,000 and No. 3 and No. 4 ~1,700,000. In the General Government there were ~120,000 Volksdeutsche.
Volksdeutsche of Polish origins were treated by Poles with special contempt, and also it constituted high treason according to Polish law.
German citizens that remained on territory of Poland became as a group persona non grata. Their had a choice of applying for Polish citizenship or being expulsed to Germany. The property, that belonged to Germans, German companies and German state, was confiscated by Polish state, along with many other properties in communist Poland. German owners, as explicit were stated by the law, were not eligible for any compensation. Those, who decided to apply, become subject of verification process. Many acts of brutal violence against Volksdeutsche happened.
Czechoslovakia
(to be written)
The children of Norwegian mothers and German soldiers were persecuted after the war, see Children of the Nazi era
After the war, France was swept with the wave of assasinations of the people connected with Vichy government.