Anthony Weiner exploded verbally Wednesday at a customer in a Brooklyn kosher bakery who called him a vulgar name, told him he was "disgusting" and disparaged him for being "married to an Arab."

Weiner shot back that the man was a "jackass" in a harangue that went on for more than two minutes in front of shoppers and employees at the Weiss Bakery.

The former congressman tweeted shortly afterward that he had "stood up to a heckler. Yep. Did that. That's what mayors have to do sometimes."

The caught-on-video argument broke out as Weiner, whose support tanked after revelations of his post-congressional sexting affairs, was stumping in the Orthodox Jewish neighborhood of Borough Park, on the morning before Rosh Hashanah.

As Weiner was on his way out, he heard Saul Kessler, of Far Rockaway, Queens, hurl the vulgarity at him and remark that Weiner was "married to an Arab." Weiner's wife, Huma Abedin, was born in Michigan -- to parents originally from India and Pakistan -- and raised in Saudi Arabia.

Kessler continued: "You're a disgusting (inaudible)."

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Weiner, his mouth still full of honey cake, shot back, "It takes one to know one, jackass." Soon, their faces were inches apart and they were angrily jabbing fingers at each other.

"You don't get to judge me because you have shown no sign you're superior to me and you're not my God," Weiner told Kessler.

Toward the end of the spat, Weiner said, "By the way, I fought very hard for this community and delivered more than you will ever in your entire life." Kessler responded, "You delivered for yourself."

A woman who answered the phone at Kessler's home and identified herself as his daughter, Jennifer, said of his comments, including the "Arab" criticism, "He's not going to deny anything he said . . . He does regret what he said, but he's not going to try to change what he said."