One of the great unknowns in South Florida is the large Latin Jewish community, including about 40,000 Cuban Jews (there are barely 1,000 still left on the island).
The 40,000 figure is exaggerated; the Jewish population at the time of Castro's ascension to power was about 12,000-15,000, and not all went to Miami; a good number went to New York.
However, you are right in the greater sense that the complete exile of the Cuban Jewish community should have been a hint to the Wiesenthal Center that Castro doesn't exactly like us Jooooooooos!
Venezuelan Jews are living the same experience as the Cubans as we speak. The ones with the wherewithal and the foresight to bail are already in south Florida, but worry a great deal about what is coming for those that remained.