Brooklyn Catholics are waging a holy war against First Lady Chirlane McCray.

After McCray enraged the faithful by ignoring the public’s top choice for her women’s statue program — Mother Frances Cabrini, the patron saint of immigrants — the Brooklyn Diocese has launched a campaign to build its own monument to her.

“Mother Cabrini recently received the most votes in the ‘She Built NYC’ competition, which aims to build more statues honoring women,” the Diocese wrote in a press release. “But despite earning this top ranking, a public statue honoring her life is not being planned.”

The flock felt compelled to act after The Post revealed McCray’s statue snub, according to Monsignor David Cassato of the Italian Apostolate, which is leading the fundraising effort along with the diocese.

“There was a story in the New York Post about Mother Cabrini, that she did not receive a recognition of a statue, and that’s what precipitated our honoring her,” said Cassato, who plans to donate $1,000 to the cause.

Brooklyn Bishop Nicholas DiMarzio noted Cabrini is deserving of the “She Built” honor because she literally helped build New York City.

“Her work to establish orphanages, schools, and a hospital, along with her commitment to immigrants, absolutely should be recognized,” he said. “The failure to honor Mother Cabrini with a public statue would be an affront to many New Yorkers, especially Italian-Americans, who see her as most deserving.”

McCray, meanwhile, insisted through a spokeswoman that she is not “anti-Catholic.”

“To claim that the First Lady is anti-Catholic is a falsehood and outrageous,” said spokewoman Jaclyn Rothenberg.

“She was invited to speak at St. Patrick’s Cathedral and has worked with Catholic Charities on a variety of mental health issues. Every one of the monuments for She Built go through the same process and the decision-making on this one was no different.”

Cabrini was public’s top choice for a statue, garnering 219 nominations, but she, along with two ohter top-5 vote-getters — Emily Warren Roebling, who directed the completion of the Brooklyn Bridge, and Manhattan Music School founder Janet Schenck — were tossed in favor of more women of color and an LGBTQ activist.

Famed New York Catholic social activist Dorothy Day, who is being considered for canonization, also didn’t get a statue. This did not sit well with local Catholic leaders.

“The exclusion of two of the most iconic Catholic women in the history of New York City — St. Frances Xavier Cabrini and Dorothy Day — seems to be the product of an implicit anti-Catholic bias,” the Diocese’s newspaper, the Brooklyn Tablet, wrote in a recent editorial.

The fundraising campaign will officially kick off Sunday with a march beginning at Mother Cabrini Park in Carroll Gardens, “the former site of a church building where Mother Cabrini first ministered to the poor immigrants of the Italian community,” the release says.

The Diocese hopes to erect the statue on the grounds of Brooklyn Borough Hall once the funds are raised, Cassato said.