PHILADELPHIA – Two days after Khizr Khan gave one of the most powerful speeches at the Democratic National Convention, lamenting the loss of his fallen son, a U.S. soldier, Donald Trump responded in a way that many considered over the line, even by Trump terms.

Khan’s son, U.S. Army Capt. Humayun S.M. Khan, was killed in Iraq in 2004. At the DNC in Philadelphia, the father noted Trump’s policy proposals would have banned his son from risking his life for the United States and pointedly said that Trump had “sacrificed nothing.”

Speaking to ABC News’ George Stephanopoulos, Trump said Khan looked like a “very nice guy,” but his wife had nothing to say, and maybe she “wasn’t allowed” to have anything to say. “A lot of people have said that,” Trump said.

Trump seemed to be implying that because of the Khans’ Muslim faith, Ghazala Khan was silenced and not allowed to speak in front of a national audience. Asked if he had sacrificed anything, Trump referred to his business ventures, calling the thousands of jobs he has created and the “great structures he’s built” sacrifices, a comment which has been widely mocked on social media, especially on Twitter, under the hashtag “TrumpSacrifices.”

“Donald Trump said that maybe I wasn’t allowed to say anything. That is not true,” Mrs. Khan wrote.

She described how her family came to the United States from Pakistan after enduring the 1965 Indo-Pakistani War, of her son’s lifelong patriotism, and how she decided not to speak at the convention because of her pain over Captain Khan’s 2004 death. “Walking onto the convention stage, with a huge picture of my son behind me, I could hardly control myself. What mother could?” she wrote.

Khrizr Khan also responded back to Trump’s insults.

“He is a black soul, and he is totally unfit for the leadership of this country,” Khizr Khan said.

Khan added that Trump’s “policy, his practices, do not reflect that he has any understanding of the basic, fundamental constitutional principles of this country.”

“He talks about excluding people, disrespecting judges, the entire judicial system, immigrants, Muslim immigrants. These are divisive rhetoric that are totally against the basic constitutional principles,” said Khan, whose speech Thursday at the Democratic National Convention riveted the nation.