A leading official in the European Commission — one of the European Union’s governing bodies — implied that efforts by Hungary’s prime minister to shut down a university founded by George Soros are anti-Semitic.

Prime Minister Viktor Orban has long harboured animosity toward Soros, a Jewish financier billionaire who was born in Hungary and has donated millions of dollars to liberal causes. Orban is now defending controversial legislation that many see as an attempt to shut down the Central European University in Budapest, a highly respected university Soros founded in 1991.

On Wednesday, Orban told the European Parliament that Soros is an “American financial speculator attacking Hungary” who has “destroyed the lives of millions of Europeans.”

The following day, European Commission First Vice President Frans Timmerman, a center-left Dutch politician, agreed when asked if he thought Orban’s comments sounded anti-Semitic.

“I understood that exactly the same way and was appalled,” Timmerman said, according to Euractiv.

Hungarian Foreign Minister Peter Szijjarto called on Timmerman to resign for his assertion.

Hundreds of academics around the world have protested Orban’s legislation, which are amendments to the Hungarian National Higher Education Act. The fight is seen as a battle between Orban’s nationalist priorities and Soros’ “open society” outlook.

Orban is a supporter of President Donald Trump and his immigration policies.