Thunberg “has joined the ranks of keffiyeh-clad protesters, brazenly voicing her disdain for the Jewish state,” the watchdog group StopAntisemitism said Friday, days after Thunberg was among those hauled off by Danish police during a demonstration at Copenhagen University.

“She has sadly transformed her activism into a platform for vile Jew-hatred,” the organization added.

The 21-year-old was arrested on Sept. 4 while protesting with the group Students Against the Occupation, which called on the university to cease all connections with Israel, including putting an end to several cross-university student programs.

Among the programs between Copenhagen University and Israel is even a student exchange program dedicated to Thunberg’s flagship cause — fighting climate change, according to StopAntisemitism.

“Sadly, Greta’s hatred of the world’s only Jewish nation eclipses her love of the environment. Despite Israel being a global leader in tackling climate disasters and rushing to aid in crises worldwide, Greta sides with their homicidal terrorist enemies,” founder Liora Rez said in a statement.

“Her actions speak louder than her words. She claims to care about the future of humanity but Greta’s hypocrisy is on full display as she’s been active in championing Hamas leaders who openly call for genocide.”

Thunberg’s arrest at Copenhagen University was just her latest appearance at an anti-Israel demonstration, a cause she’s taken up in full force since Hamas’ Oct. 7 attack.

“We demand that the Stockholm University administration cut all ties, agreements and collaborations with the genocidal, apartheid state of Israel,” she wrote after attending a demonstration at Stockholm University in May, where she was also carried away by police.