the German invasion was 800,000, of which 365,000 survived. Communist rule At the end of World War II, only 140,000 Jews remained in Hungary, down from 750,000 in 1941. The difficult economic situation coupled with the lingering anti-Semitic attitude of the population prompted a wave of migration. Between 1945 and 1949, 40,000–50,000 Jews left Hungary for Israel (30,000–35,000) and Western countries (15,000–20,000). Between 1948 and 1951 14,301 Hungarian Jews immigrated to Israel, and after 1951 exit visas became increasingly expensive and restrictive. People of Jewish origin dominated the post-war Communist regime until 1952–53 when many were removed in a series of purges. During its first years, the regime's top membership and secret police were almost entirely Jewish, albeit naturally anti-religious. Leaders like Mátyás Rákosi, Ernő Gerő and Peter Gabor repudiated Judaism and were strict atheists per Communist doctrine. Indeed, under Communist rule from 1948 to 1988, Zionism was outlawed and Jewish observance was curtailed. Moreover, members of the upper class, Jews and Christians alike, were expelled from the cities to the provinces for 6–12 months in the early 1950s. Jews were on both sides of the 1956 uprising. Some armed rebel leaders like István Angyal, an Auschwitz survivor executed on December 1, 1958, were Jewish. Jewish writers and intellectuals such as Tibor Déry, imprisoned from 1957 to 1961, occupied the forefront of the reform movement. After the Hungarian Revolution of 1956, about 20,000 or so Jews fled the country. About 9,000 went to Israel while others settled in the United States, Canada, Australia, Western Europe, and Latin America. An estimated 20% of the Hungarian refugees entering Canada in 1957 were Jewish. The Hungarian Jewish population declined both because of emigration and because of high levels of assimilation and intermarriage and low birth rates. The Jews with the strongest Jewish identities were typically the ones who emigrated. By 1967, only about 80,000–90,000 Jews (including non-religious Jews) remained in the country, with the number dropping further before the country's Communist regime collapsed in 1989. Under the milder communist regime of János Kádár (ruled 1957–1988) leftist Jewish intelligentsia remained an important and vocal part of Hungarian art and sciences. Diplomatic relations with Israel were severed in 1967 following the Six-Day War, but it was not followed by antisemitic campaigns as in Poland or the Soviet Union. From the 1990s Hungary's Jewish population (within its current borders) decreased from nearly half a million after