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Well, I don't know about "everywhere else," but after World War II, many Jews did attempt to "go home" to Poland. This resulted in the murder of about 1,500 of them -- killed not by Nazis but by Poles, either out of sheer ethnic hatred or fear they would lose their (stolen) homes.
The mini-Holocaust that followed the Holocaust itself is not well-known anymore, but it played an outsize role in the establishment of the state of Israel. It was the plight of Jews consigned to Displaced Persons camps in Europe that both moved and outraged President Harry Truman, who supported Jewish immigration to Palestine and, when the time came, the new state itself. Something had to be done for the Jews of Europe. They were still being murdered.
In the Polish city of Kielce, on July 4, 1946 -- more than a year after the end of the war -- rumors of a Jewish ritual murder triggered a pogrom in which 42 Jewish Holocaust survivors were killed. The Kielce murders were not, by any means, the sole example of why Jews could not "go home." When I visited the Polish city where my mother had been born, Ostroleka, I was told of a Jew who survived Auschwitz only to be murdered when he tried to reclaim his business. In much of Eastern Europe, Jews feared for their lives.
For that reason, those who had struck out for home soon returned to DP camps and the safety of -- irony of ironies -- Germany. Some of the camps were under the command of Gen. George S. Patton, a great man on the screen, a contemptible bigot in real life. In his diary, Patton confided what he thought of Jews. Others might "believe that the Displaced Person is a human being," Patton wrote, but he knew "he is not." In particular, he whispered to his diary, the Jews "are lower than animals."
The Jews, Patton felt, had to be kept under armed guard, otherwise they would flee, "spread over the country like locusts," and then have to be rounded up and some of them shot because they had "murdered and pillaged" innocent Germans. All of this is detailed by Allis and Ronald Radosh in their book about the founding of Israel, "A Safe Haven."
More:
http://www.washingtonpost.com/wp-dyn/content/article/2010/06/07/AR2010060702583.html?hpid=opinionsbox1