as stated by me in oleg's thread regarding the decision of czech parliament i opening the topic again.
here again i state that expulsion of germans from was made possible by presence of soviet forces in eastern europe
the post war government of poland and czechoslovakia were weak and there daily existence survived on soviet forces even normal police duty were performed by soviet forces.
expulsion of germans a decision of polish and czech government was carried and implemented by soviet forces with full knowledge of stalin and beria, here i am quoting some evidence for the same here-
source-Robert Murphy, the political advisor of General Eisenhower, and later the political advisor of Clay during the occupation in Germany, was one of the first official voices in the American government that opposed the Expulsion, and to criticize the manner in which the Expulsion was being carried out.
In a memorandum to the State Department of 12 October 1945 he presented this moral dilemma very eloquently, and I quote in part:
"Knowledge that they are the victims of a harsh political decision carried out with the utmost ruthlessness and disregard for the humanities does not cushion the effect. The mind reverts to other mass deportations which horrified the world and brought upon the Nazis the odium which they so deserved. Those mass deportations engineered by the Nazis provided part of the moral basis on which we waged war and which gave strength to our cause. Now the situation is reversed. We find ourselves in the invidious position of being partners in this German enterprise and as partners inevitably sharing the responsiblity."
As a result of this and all the memoranda of Murphy, the American government repeatedly protested at Warsaw and at Prague and tried to get some cooperation from the Czechoslovak government and from the Polish government.
But unfortunately the Soviet occupation forces in those areas encouraged both the Polish and the Czechoslovak governments in the Expulsion, so there was no way for the U.S. to effectively stop it.
http://www.meaus.com/Expulsion_of_Germans.html
so the expulsion of germans from eastern europe was a crime commited by former soviet union and responsibility of soviet union,stalin and beria is more than any other individual or government from eastern europe