Israel’s ambassador to Macedonia dismissed a charge that such calls are "counterproductive."
The students were assigned to re-create a Nazi laboratory to highlight the supposed progress made by doctors working in concentration camps.
He also pledged to conduct a comprehensive review of his country's relations with the Jewish state.
Poland's interior minister expressed pride in the event, which featured signs such as "Sieg Heil" and "Remove Jewry from power."
The British royal also expressed hope that a U.S. president would stand up to the "Jewish lobby."
The 2016 figures showed a 56 percent decline over the past five years.
The event attended by Jews and non-Jews highlighted the importance of religious tolerance in the city, the mayor said.
It is the first time in a decade that the U.S. is offering rewards for Hezballah operatives under its counterterrorism rewards program.
A Jewish leader said the government "acknowledged the error and agreed to correct it immediately.”
“I can tell you it was easily one of the most difficult and lonely periods of my life,” Caroline Marcus wrote of her situation.