"Today there is no doubt that we are living in an age of resurgent anti-Semitism," Netanyahu said at the opening of the fifth Global Forum for Combating Antisemitism.
"Jews everywhere are once again being slandered and vilified," he said.
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"This is taking place in the intolerant parts of the Middle East but it's also taking place in what otherwise would be expected to be the tolerant parts of the West.
"It's taking place in Beirut, in Damascus, in Tehran. But it's also taking place, violently so, in Toulouse, in Paris, in Brussels," said the Israeli leader.
Other speakers at the forum included German Justice Minister Heiko Maas and Paris Mayor Anne Hidalgo.