Shortly after Khizr Khan, the father of Army Captain Humayun S.M. Khan, took to the stage at the Democratic National Convention on Thursday, conservative commentator Ann Coulter sent out a tweet to mock the father. And many of her colleagues on the right took offense.

“You know what this convention really needed? An angry Muslim with a thick accent like Fareed Zacaria [sic],” Coulter tweeted, referring to CNN host Fareed Zakaria.

Khan’s son, Capt. Humayun Khan, died serving in the U.S. Army and was hailed as a hero after telling his fellow soldiers to step away from a suspicious vehicle near Baquba, Iraq. As Khan approached the car, it exploded.

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Captain Khan was posthumously awarded the Bronze Star and Purple Heart.

During the Democratic National Convention, the elder Khan spoke out against Republican presidential candidate Donald Trump for his comments about Muslims and spoke in depth about how his son sacrificed his life to stop a suicide bomber for the U.S.

“Hillary Clinton was right when she called my son the best of America. If it was up to Donald Trump, he never would have been in America,” Khan said in his speech. “Donald Trump consistently smears the character of Muslims. He disrespects other minorities, women, judges, and even his own party leadership. Donald Trump loves to build walls and ban us from this country.”

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Several people, including well-known conservatives, responded on Twitter to express their disgust with Coulter’s tweet.

You know what this convention really needed? An angry Muslim with a thick accent like Fareed Zacaria. — Ann Coulter (@AnnCoulter) July 29, 2016

Read their responses below.

I'm ashamed ever to have known you. https://t.co/AkddX4uNa0 — John Podhoretz (@jpodhoretz) July 29, 2016

What a terrible thing to say about a man whose son died for this country. https://t.co/h9Zp4x3j6v — Erick Erickson (@EWErickson) July 29, 2016

Hey @AnnCoulter: Your subhuman tweet about Mr. Khan, who is a better American than 1000 of you, has made me actually feel sorry for you — Keith Olbermann (@KeithOlbermann) July 29, 2016

You know what this tweet really needed? Spellcheck. https://t.co/afQRxFISj7 — Liz Mair (@LizMair) July 29, 2016

Ann Coulter—you are one pitiful, despicable person. I'd take 100 million citizens like Khizr Khan before you—any day https://t.co/9eR3vSeMDa — kevinpmiller (@kevinpmiller) July 29, 2016

Ann Coulter's comment on the father of the Brave Muslim American soldier who died a hero proves she's nothing but a vile, irrelevant plebe. — Sawsharee (@sawsharee) July 29, 2016

Stop sharing Ann Coulter's tweets. Her internal mechanisms are powered by hate. — Jon Lovett (@jonlovett) July 29, 2016

For Khizr Khan’s full speech, click below.