Some of his best friends are Jewish.

Bethenny Frankel burst out laughing in court Monday when her ex-husband claimed on the stand to have “many Jewish friends” — after her lawyer read a series of texts he wrote to the reality TV star mocking her newly rediscovered Jewish faith.

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“I have no bad feelings toward any religion. I have many Jewish friends,” Jason Hoppy said while testifying during the first day their custody battle in Manhattan Civil Court.

To that, Frankel snickered so hard that she had to cover her mouth.

Hoppy was responding to texts he sent the “Real Housewives of New York” star — whose dad was Jewish, while her mom converted to the religion — starting around Rosh Hashanah in 2016.

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“‘Is everything okay? You seem very upset. And oh yeah, happy holidays,'” Frankel’s attorney Allan Mayefsky said, reading the text from Hoppy.

“You were mocking her for celebrating the Jewish holidays, weren’t you?” the lawyer asked.

Hoppy responded, “I believe so.”

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Later in their text conversation, Frankel told Hoppy: “Leave us alone. It’s a holiday weekend, we’re trying to enjoy it with family and friends,” according to Mayefsky.

“Holiday? That’s hysterical,” Hoppy texted back.

In another text, he said, “apparently you’re now Jewish,” with a laughing emoji.

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“It was a very snarky response,” Hoppy told Mayefsky, before making the claim about his “many” Jewish pals.

Frankel is seeking full custody of their 8-year-old daughter, Bryn, and Mayefsky came to court toting two large binders full of his vitriolic email and text communications with Frankel.

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He began by reading one missive from Hoppy following their original custody agreement in 2014, saying: “You’re a sad, miserable, bitter, and unhappy person to not let me see my daughter, and I’ll pray for you. You’re exactly like your mother.”

“Did you think that would be a welcome communication?” the attorney asked.

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“I take full responsibility looking back,” Hoppy replied — then turned to Frankel, adding, “I apologize for writing that to you.”

Mayefsky said, “Well, I think we’re gonna have a lot of that today”

And indeed, Hoppy continued to offer mea culpas as the attorney read messages from him variously calling Frankel “bitter, unhappy, and miserable” and accusing her of trying to create an “attention seeking moment for social media” by buying Bryn two puppies.

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“It was a childish comment that I regret sending,” he said about the puppy message.

This article originally appeared on Page Six.