A son of a 9/11 victim used his platform on the 18th anniversary of the terrorist attacks to slam progressive Muslim-American Democratic congresswoman Ilhan Omar for dismissing the tragedy as 'some people did something' earlier this year.

Nicholas Haros Jr., speaking at Ground Zero and wearing a t-shirt with Omar's quote printed on it, demanded to know where her 'confusion' came from.

'Some people did something, said a freshman congresswoman from Minnesota, to support and justify the creation of CAIR,' Haros said. 'Today I am here to respond to you, exactly who did what to whom. Madam, objectively speaking we know who and what was done, there is no uncertainty about that. Why your confusion?'

He went on the explain the horrific event nearly two decades ago when 19 Islamic terrorists engaged in a scheme to hijack airplanes and fly them into buildings in New York City and Washington D.C.

'Is that clear?' he questioned after outlining the events that led to the loss of nearly 3,000 American lives.

'I remember all. I remember them all and pray with you for them today,' Haros, who lost his 76-year-old mother in the attacks, said.

Solemn ceremony: Nicholas Haros was speaking at the New York commemoration of the 18th anniversary of the September 11 attacks, which claimed his mother's life

Target: Ilhan Omar was singled out by Haros because, he said, she had described 9/11 as 'some people did something.'

'But as to whom,' Haros continued, 'I was attacked, your relatives and friends were attacked, our constitutional freedoms were attacked and our nation's founding on Judeo-Christian principles were attacked.'

'That's what some people did,' he railed. 'Got that now?'

Haros also called out the rest of the so-called 'squad,' which includes the Minnesota congresswomen and fellow progressive freshman Representatives Alexandria Ocasio-Cortez, Rashida Tlaib and Ayanna Pressley.

'We are here today, congresswoman, to tell you and the Squad just who did what to whom. Show respect in honoring them, please,' he said. 'American patriotism in your position demand it.'

Haros' mother Frances Haros, 76, was a receptionist at Keefe Bruyette & Woods, a securities brokerage and investment bank, on the 89th floor of the South Tower.

She had commuted every day from her Staten Island home and refused to stop working, despite her family wanting her to retire.

His criticism lasted for nearly a minute and a half, and drew a smattering of applause.

Haros, 66, is a Roman Catholic from Ocean County, New Jersey, who evangelizes online through a group he founded called Facebook Apostles.

Omar fled her native Somalia as a child before her family found asylum in the United States in the 1990s. She was elected from Minnesota last November as a Democrat to the U.S. House of Representatives.

Right-wing critics have vilified her for her outspoken criticism of Trump's anti-immigrant and anti-Muslim rhetoric and policies and of the Israeli government's treatment of Palestinians.

She was banned by Israel from going there on a Congressional delegation, with vocal backing for the move from Trump.

The president has accused Omar of loving and supporting al Qaeda, questioned her patriotism and told her to 'go back' to Somalia.

Lost: Frances Haros was a receptionist at Keefe Bruyette & Woods, a securities brokerage and investment bank, on the 89th floor of the South Tower. She had not wanted to retire and commuted every day from her home on Staten Island

Response: Ilhan Omar's office said this statement was her only response to the attack from the bereaved son

The insults have led to an increase in death threats against Omar, her office has said. Omar has openly condemned al Qaeda and its affiliates, calling their members 'terrorists.'

Omar has come under fire for remarks she made earlier this year about the increased prejudice and state surveillance faced by Muslims in the United States after the 2001 attacks.

She said the Council on American-Islamic Relations (CAIR), a Muslim civil-rights group, was created after the attacks 'because they recognized that some people did something and that all of us were starting to lose access to our civil liberties.'

CAIR was founded in the 1990s, and Omar's office later said she misspoke, meaning that the organization's reach grew after the attacks.

Shorn of its context, the phrase 'some people did something' has been wielded by Omar's opponents, including Trump, to suggest she diminishes the attack.

At Monday's ceremony, Haros wore a T-shirt saying 'SOME PEOPLE DID SOMETHING?' and a baseball cap advertising his group, Facebook Apostles.

Asked for comment, Omar's office shared her statement from earlier in the day: 'September 11th was an attack on all of us,' her statement said. 'We will never forget the thousands of Americans who lost their lives in the largest terror attack on U.S. soil.'

This isn't the first time Haros has used the anniversary of the terrorist attacks to call out Democratic lawmakers.

Last year, after reading his portion of the list of names of victims, he bashed now-House Speaker Nancy Pelosi, New Jersey Senator Cory Booker, who is now running for president, and members of the media for using 9/11 and its victims as political props.'

'One more thing, if I may,' Haros started after paying tribute to his late mother while speaking in 2018 – talking over the music meant to end his speaking time.

'This year, a representative of the House referred to our loss as just another incident. This year, a network commentator said the president's performance in Helsinki was a traitorous act as was 9/11,' Haros said. 'And last week, a senator attacked a Supreme Court nominee and called him a racist for alleged comments after 9/11.'

'Stop. Stop. Please stop using the bones and ashes of our loved ones as props in your political theater,' he pleaded. 'Their lives, sacrifices and death are worth so much more. Let's not trivialize them or us. It hurts.'