Author and CNN commentator Marc Lamont Hill was dropped from the network following comments he made at a U.N. event, calling on Israel to support the rights of the Palestinian people.

CNN confirmed the termination of his contract in a statement.

Hill, also a professor at Temple University, spoke in New York on Wednesday at the U.N.’s Committee on the Exercise of the Inalienable Rights of the Palestinian People, in anticipation of the International Day of Solidarity with the Palestinian People. He said he just arrived from Palestine, where he was “boycotting Israeli water.”

“If we’re to operate in true solidarity with Palestinian people we must allow the Palestinian people the same range of opportunity and political possibility,” he said in the speech, shared on Twitter.

“We must prioritize peace, but we must not romanticize or fetishize it,” he said, “We must advocate and promote non-violence at every opportunity but we cannot endorse a narrow politics of respectability that shames Palestinians for resisting, for refusing to do nothing in the face of state violence and ethnic cleansing.”

But it was his concluding remarks to “free Palestine from the river to the sea” that received flak on social media. Many saw it as a reference to the boundaries of the Jordan River to the Mediterranean Sea and called it anti-Semitic rhetoric that’s reportedly used by fundamentalist group Hamas calling for the elimination of Israel.

In a series of tweets, Hill responded to the criticism, saying the interpretation of his reference to “from sea to the river” was misleading.

“I support Palestinian freedom. I support Palestinian self-determination. I am deeply critical of Israeli policy and practice,” he tweeted. “I do not support anti-Semitism, killing Jewish people, or any of the other things attributed to my speech. I have spent my life fighting these things.”

I support Palestinian freedom. I support Palestinian self-determination. I am deeply critical of Israeli policy and practice. I do not support anti-Semitism, killing Jewish people, or any of the other things attributed to my speech. I have spent my life fighting these things. — Marc Lamont Hill (@marclamonthill) November 29, 2018

Many supported the move by CNN, believing his speech was anti-Semitic and pointing out his relationship with controversial figure Louis Farrakhan.

Thank you @CNN for doing the right thing. This sends a powerful statement that antisemitism will not be tolerated. https://t.co/NmPzKX75Rj — Peter Fox (@thatpeterfox) November 29, 2018

Bravo to CNN. It's about time establishment media take a stand against the dangerous strand of rampant anti-Semitism on the left masquerading as "policy." This is a good move. — Benny (@bennyjohnson) November 29, 2018

He's also used his @CNN platform to oppose funding for Israel's Iron Dome air defense system—which does nothing but shoot down rockets fired at Israeli towns—because it "takes away all of Hamas's military leverage," saying, "that, for me, is the problem." https://t.co/D0y8UebP3v — Avi Mayer (@AviMayer) November 29, 2018

If your social justice involves using slogans that call for the genocide of half the world’s Jewish population you’re no ally for justice. https://t.co/SQEXba2Ydb — Peter Fox (@thatpeterfox) November 29, 2018

Others were unhappy with CNN’s decision. Actor Mark Ruffalo noted that criticizing Israel’s policies does not equal anti-Semitism. Others called Hill’s firing hypocritical when other commentators—like ultra-conservative Rick Santorum—have said similar things.

re: Marc Lamont Hill's absurd firing, here's Rick Santorum, paid CNN contributor https://t.co/tQUC7MrxsA pic.twitter.com/Gbv9nLUeZc — Saladin Ahmed (@saladinahmed) November 29, 2018

CNN's firing of Marc Lamont Hill over his Israel/Palestine speech is a major victory for “online call-out culture” but a major defeat for the right to advocate for Palestinian rights, to freely critique Israel, and for journalism and public discourse to accommodate dissent. https://t.co/FA9oOgxz3H — Glenn Greenwald (@ggreenwald) November 30, 2018

THIS is what @CNN fired @marclamonthill for, calling for a free Palestine. The truth is, Israel is neither committed to a peace process nor intends to ever pull out of the territories. The transience of the occupation is a lie.#FreePalestine pic.twitter.com/7TQD9CVeh4 — Bishop Talbert Swan (@TalbertSwan) November 30, 2018

Criticizing the actions of Israel is not anti-semitism. Since when is advocating for human rights a fireable offense? Join us in standing in solidarity with Dr. @MarcLamontHill: https://t.co/5Sd3b1qdBK — Mark Ruffalo (@MarkRuffalo) November 30, 2018

IfNotNow, a movement by young American Jews calling for an end of the Jewish “community’s support for the Israeli occupation,” initiated a petition to get Hill his contract back. The petition had reached 1,515 of its target 1,600 signatures as of this posting.

Agree with @RashidaTlaib? Then sign our petition demanding @CNN reinstate @marclamonthill. Because standing up for Palestinian freedom is not antisemitic. And in the Trump Era, with rising white nationalism, to make that mistake is dangerous. Sign here: https://t.co/deCVLxTL8Q https://t.co/zNanxCUibq — IfNotNow🔥 (@IfNotNowOrg) November 30, 2018

However, it’s unclear if Hill would take another contract if offered one as a result of the petition. On Thursday, he stood by his statement.