The Voodoo faithful sing, their voices rising above the gunfire erupting miles away as frantic drumbeats drown out their troubles.

They pause to swig rum out of small brown bottles, twirling in unison as they sing in Haitian Creole: “We don’t care if they hate us, because they can’t bury us.”

Shunned publicly by politicians and intellectuals for centuries, Voodoo is transforming into a more powerful and accepted religion across Haiti, where its believers were once persecuted. Increasingly, they seek solace and protection from violent gangs that have killed, raped and kidnapped thousands in recent years.

The violence has left more than 360,000 people homeless, largely shut down Haiti’s biggest seaport and closed the main international airport two months ago. Basic goods including food and life-saving medication are dwindling; nearly two million Haitians are on the verge of famine.

From January to March alone, more than 2,500 Haitians were killed or injured, up more than 50 per cent from the same period last year, according to the UN.

Amid the spiralling chaos, numerous Haitians are praying more or visiting Voodoo priests known as “oungans” for urgent requests ranging from locating loved ones who were kidnapped to finding critical medication needed to keep someone alive.

“The spirits help you. They’re always around,” said Sherly Norzéus, who is initiated to become a “mambo” or Voodoo priestess.

In February, she invoked Papa Ogou, god of war and iron, when 20 armed men surrounded her car as she tried to flee the community of Bon Repos. Her three children and the two children of her sister, who died during childbirth, sat next to her.

“We are going to burn you alive!” she recalled the gunmen yelling.

Gangs had invaded their neighbourhood before dawn, setting fire to homes amid relentless gunfire.

“I prayed to Papa Ogou. He helped me get out of the situation,” Norzéus said.

When she opened her eyes, the gunmen signalled that she was free to leave.

Voodoo was at the root of the revolution that led Haiti to become the world’s first free Black republic in 1804, a religion born in West Africa and brought across the Atlantic by slaves.

The syncretic religion that melds Catholicism with animist beliefs has no official leader or creeds. It has a single God known as “Bondye,” Creole for “Good God,” and more than 1,000 spirits known as the lwa — some that aren’t always benevolent.

During Voodoo ceremonies, lwa are offered treats ranging from papayas and coffee to popcorn, lollipops and cheese puffs. A ceremony is considered successful if a Voodooist is possessed by a lwa. Some experts consider it a religion of the exploited.

“Voodoo is the system that Haitians have developed to deal with the suffering of this life, a system whose object is to minimise pain, avoid disaster, soften losses, and strengthen the survivors as much as the survival instinct,” Haitian sociologist Laënnec Hurbon wrote in a recent essay.

Voodoo began to take shape in the French colony of Saint-Domingue during funeral rituals for enslaved people and dances called “calendas” that they organised on Sunday evenings. It also was practised by slaves known as Maroons who escaped to remote mountains and were led by François Mackandal, a Voodoo priest.

In August 1791, some 200 slaves gathered at night in Bois-Caiman in northern Haiti for a Voodoo ceremony organised by Dutty Boukman, a renowned enslaved leader and Voodoo priest. They sacrificed a pig, drank its blood and swore to keep secret an imminent revolt against slavery, according to a surgeon present at the ceremony.

After a 13-year revolution, Haiti became independent, but Voodoo remained oppressed. The country’s new leaders condemned Voodoo worship, as did the Catholic Church. Catholic leaders demanded parishioners take an oath renouncing Voodoo in 1941.

Thousands of Voodoo followers were lynched and hundreds of symbolic spaces destroyed in what became the most violent attack in Haiti’s history against the religion, according to journalist Herbert Nerette. But Voodoo persisted.

When François Duvalier became president in 1957, he politicised the religion during his dictatorship, appointing certain oungans as its representatives, Hurbon wrote. By 2003, Jean-Bertrand Aristide, a Salesian priest who became Haiti’s first democratically elected president, recognised Voodoo as one of Haiti’s official religions. Despite the formal recognition, Voodoo remains shunned by some Haitians.

“When you say you are a Voodooist, they stigmatise you,” said Kadel Bazile, a 42-year-old civil engineer.

Until recently, Bazile was a practising Catholic. But when he lost his job and his wife left him nearly two years ago, a friend suggested he try Voodoo.

“What I find here is spirituality and fraternity. Being here is like being with family,” he said while attending a May 1 ceremony to honour Kouzen Zaka, the lwa of harvest.

He identifies the most with Erzulie Dantor, the divinity of love represented by a Black Madonna with scars on her right cheek.

“That is the spirit who lives in me,” he said. “She is going to protect me.”

As the ceremony started, Bazile smiled and moved to the beat of the drums while dancers twirled nearby, their long earrings swaying to the rhythm. Voodoo is attracting more believers given the surge in gang violence and government inaction, said Cecil Elien Isac, a 4th-generation oungan.

“Whenever the community has a big problem, they come here, because there is no justice in Haiti. You find it in the ancestral spirits,” he said.

When Isac opened his temple years ago in Port-au-Prince, about eight families in the area became members. Now he counts more than 4,000, in Haiti and abroad.

“We have a group of intellectuals who have joined,” he said. “Before, it was people who couldn’t read or write. Now it has more visibility.”

Credited with that turnaround are thinkers like Jean Price-Mars, whose 1928 book, Thus Spoke the Uncle, visualised Voodoo as a religion, “without making the Haitian elites blush,” wrote sociologist Lewis Ampidu Clorméus.

“Until the 1920s, Haitian Voodoo was generally regarded as a string of superstitions, witchcraft and ritual cannibalism,” Clorméus wrote. “Talking about Voodoo constituted a shame for Haitian intellectuals.”

Voodoo has since become a key ingredient in Haiti’s rich cultural scene, inspiring music, art, writing and dance. It’s unknown how many people currently practice Voodoo in Haiti, but there’s a popular saying: “Haiti is 70 per cent Catholic, 30 per cent Protestant and 100 per cent Voodoo.”

Voodoo also has countless lwas, although Ogou Je Wouj – the god of red eyes – has grown more significant to Haitians given the lack of security in the country, said Erol Josué, a singer, oungan and director of Haiti’s National Bureau of Ethnology. Ogou Je Wouj is a manifestation of the god of war and is believed to wield a machete.

“They want power in their body and in their mind,” Josué said of those who seek the god.

While spirits infuse believers with energy and hope, Voodoo priests warn they don’t perform miracles.

“We’re praying, but we’re also taking precautions,” Isac said. “There are a lot of lwas to protect you from kidnapping, but if you walk through certain areas, no lwa is going to protect you.”

On a recent afternoon, hundreds of Haitians gathered on a steep hill and squeezed into a small church to celebrate St George, a Christian martyr believed to be a Roman soldier revered by Catholics and Voodooists alike. They offered him money and prayers in hopes they would make it through Haiti’s deepening crisis.

“It’s very important to be here,” said Hervé Hyppolite, a chef who practises Christianity and Voodoo. “You find force, courage and also protection.”

Surrounding him was a sea of people clad in khaki and red, the saint’s colours. Some held candles as a handful of women danced nearby,

“St George!” the priest leading the celebration yelled. The crowd shouted in response, “We need you!”

Josué, the singer and oungan, noted that some young people becoming Voodooists are trying to change traditional prayers or certain practices, but he said oungans and mambos are not embracing the push.

“We make them understand that those spirits are a symbol of resistance of the Haitian nation,” he said. “There’s a lot of substance in Voodoo that can lead to a renaissance of Haiti.”

• An AP report