Donald Trump Jr.Donald (Don) John TrumpMelania Trump's 'Be Best' hashtag trends after president goes after Greta Thunberg Trump Jr. blasts Time for choosing 'marketing gimmick' Greta Thunberg as Person of the Year White House calls Democratic witness's mentioning of president's youngest son 'classless' MORE defended Chelsea Clinton on Saturday after she was confronted at a vigil honoring the victims of the New Zealand mosque attacks and accused of spreading hatred.

“It’s sickening to see people blame @ChelseaClinton for the NZ attacks because she spoke out against anti-Semitism,” the president’s eldest son wrote on Twitter.

“We should all be condemning anti-Semitism & all forms of hate. Chelsea should be praised for speaking up. Anyone who doesn’t understand this is part of the problem,” he added.

Clinton, an author and the daughter of former President Bill ClintonWilliam (Bill) Jefferson ClintonCNN's Cuomo promotes 'Dirty Donald' hashtag, hits GOP for 'loyalty oath' to Trump Whether a rule is cruel or kind, regulatory analysis shines a light Moderate or left of center — which is better for Democrats in 2020? MORE and former Secretary of State Hillary ClintonHillary Diane Rodham ClintonNo, the polls aren't wrong — but you have to know what to look for How to shut down fake Republican outrage over 'spying' on Trump More than 200,000 Wisconsin voters will be removed from the rolls MORE, was confronted while attending a vigil for victims of Friday's massacre at two mosques in Christchurch, New Zealand. The shooting left 49 people dead and dozens injured.

“This right here is the result of a massacre stoked by people like you and the words that you put out into the world,” a student can be heard saying to Clinton in video footage. “And I want you to know that and I want you to feel that deep down inside. Forty-nine people died because of the rhetoric you put out there.”

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Clinton, who is pregnant with her third child, said she was sorry the students felt that way.

“Certainly, it was never my intention," Clinton said. "I do believe words matter. I believe we have to show solidarity.”

The confrontation reportedly stemmed from Clinton’s condemnation of comments made by Rep. Ilhan OmarIlhan OmarIlhan Omar responds to 'Conservative Squad': 'Imitation is the sincerest form of flattery' Biden narrowly ahead in Iowa as Sanders surges, Warren drops: poll Sanders, Omar to hit campaign trail in New Hampshire MORE (D-Minn.) in recent weeks. Omar has been at the center of a debate on anti-Semitism after her remarks about U.S.-Israel relations.

Clinton, who is the vice chairwoman of the Clinton Foundation, condemned Friday's attacks on the New Zealand mosques.

"Heartbroken & horrified by the white nationalist terrorist attack during Jummah on the mosques and Muslim community in Christchurch," she wrote on Twitter on Friday. “Keeping all affected by this tragedy in my heart and prayers. We need a global response to the global threat of violent white nationalism."

A 28-year-old Australian man has been charged with one count of murder in connection with the massacre, though he is expected to face more charges. He appeared to flash a white supremacist sign in court on Saturday. 

A social media account believed to be linked to the suspected gunman posted a manifesto that expressed anti-immigrant and anti-Muslim views prior to the attack.

The suspect also wrote that he supported President Trump “as a symbol of renewed white identity and common purpose.” The White House rejected his comments on Friday.