Israel’s ambassador to the United Nations, Danny Danon, on Monday encouraged “action” against U.S. Congresswoman Ilhan Omar, directly meddling in American politics.

Taking to Twitter, Danon referred to the right-wing StopAntisemitism.org organization that “just named Congresswoman Omar its 2019 Antisemite of the Year.” He added: “Here is a clear opportunity to prove that all the talk about standing up to #antisemitism is not just an empty promise.”

Danon, a former Likud minister who was appointed by Prime Minister Benjamin Netanyahu as Israel’s envoy to the UN in 2014, has 52,000 followers on Twitter.

His tenure at the UN has been recently extended by Netanyahu's transitional government.

In 2019, Omar sparked controversy, making statements that Jewish groups and her congressional colleagues called anti-Semitic.

Omar, a Democrat from Minnesota, came under fire for posting successive tweets suggesting that the American Israel Public Affairs Committee, the pro-Israel lobby, pays politicians to be pro-Israel. Democratic and Republican leaders condemned the tweets as echoing anti-Semitic stereotypes about Jews, money and power. The allegation is also false, as AIPAC does not donate to candidates or endorse them.

The freshman lawmaker apologized for the tweets a day later and deleted them.

Dan Shapiro, former U.S. ambassador to Israel who served under the Obama administration, wrote in reply to Danon’s tweet: “Is this an official statement of the Israeli government?”

Michael Koplow, policy director of the Israel Policy Forum, an organization that advocates for a two-state solution, called Danon’s tweet “unnecessarily inflammatory, embarrassingly juvenile, and a great example of what happens when a diplomat thinks social media trolling is more important than actual diplomacy.”