Donald Trump is a bully. He goes after his competitors with personal attacks, insults, and slurs. But if you really want to know just want kind of person he is, take a look at the people he attacks.

One of the most powerful moments of the Democratic convention was when Khizr Khan, the father of Humayun Khan, a Muslim U.S. soldier who gave his life for his country in Iraq, directly addressed Donald regarding his Islamophobic policies and repeated implications that Muslim Americans’ loyalty cannot be trusted.

Khan offered to lend Donald his own copy of the U.S. Constitution, so that he might learn about “liberty” and “equal protection.” As he gave his moving address, Ghazala, his wife and Humayan’s mother, stood at his side, her face marked with pain.

When Donald was asked what he thought of Khan’s address, his response was to use an anti-Muslim dog whistle to attack the Khans.

From Political Wire:

Trump suggested that Khan’s wife didn’t speak because she was forbidden to as a Muslim: “I’d like to hear his wife say something.” And he questioned whether Khan’s words were his own: “Who wrote that? Did Hillary’s script writers write it? I think I’ve made a lot of sacrifices. I work very, very hard.”

Process that: Donald Trump ridiculed the parents of a soldier who died for Donald’s freedom, using an Islamophobic stereotype.

That’s what he does. Over and over.

He was unhappy with the way fire marshal Brett Lacey did his job at a Trump-Pence campaign event, so Donald attacked Lacey, who was named Civilian of the Year, saying Lacey must be a Hillary supporter:

And for his open support of Hillary, Donald also attacked General John Allen, “a 4-star general who served America for 37 years.”

Allen spoke at the Democratic convention because he believes that Hillary will be the best commander-in-chief. The Khans appeared at the Democratic convention because they believe Hillary cares about people like them and their fallen son, whose story she told in a speech in Minneapolis in December of 2015:

Donald mocks and attacks people. Hillary tells their stories, and personally reaches out to them.

In the Boston Globe, my friend Marianne Leone writes movingly about Donald’s disgusting attack on a reporter with a congenital joint condition, juxtaposing it against the tears of joy she wept seeing her friend Anastasia Somoza speak at the Democratic convention.

“When Donald Trump made fun of New York Times reporter Serge Kovaleski,” she writes, “he also mocked my boy for something he couldn’t help. It’s painful, not just because of the random cruelty, the dismissal of our Jesse as somehow less than human, the invitation to a jeering crowd to mock someone who is different. Watching Trump flapping his hands and inviting the world to laugh with derision at our late son’s spastic hands makes my heart sink even 11 years after his death.”

Hillary didn’t personally know Marianne and her husband, or their son Jesse, but knew of their activism through Anastasia’s mom, Mary Somoza. When Jesse died, Marianne writes, Hillary “sent us a kind note with blessings and the hope that the love we shared with Jesse could become our comfort in the dark days after his death. Yes, I’m with her.”

That’s the kind of person Hillary is.

Donald is the kind of person who ridicules and attacks disabled people. And grieving Muslim parents. And veterans. And civic heroes.

What kind of man does that? The kind of man who has no business leading a country full of people for whom he has contempt.

His utter lack of dignity is best understood by hearing the words of a man of true dignity and integrity:

[Peter Daou contributed to this article.]

(AP Photos)