"This should not be forgotten and this should never happen again," said Mesic.
Bet Israel president Ivo Goldstein said Holocaust Memorial Day perhaps would not be observed if there did not exist forces which negated the Holocaust.
He said those revisionist forces were politically defeated in the West. "In France one such historian was convicted and fired from university," he said, adding that the Briton David Irving had been convicted in Austria. "Nowadays Irving is spoken of only as a writer."
Goldstein said the Holocaust began at the start of the 20th century against the Armenians, repeatedly occurred around the world, and ended in the 1990s, in Croatia as well. He said the biggest Holocaust was committed against Jews by the Nazis and their allies between 1933 and 1945.
Holocaust Memorial Day is observed on January 27, to commemorate 27 January 1945, when the surviving inmates of Auschwitz were liberated. Croatia has been observing it since 2003.