(RNS) An umbrella group of Christian denominations committed to combating racism is urging churches to use the death of Florida teen Trayvon Martin as a “teachable moment” to speak out against racial stereotypes.

“It is a time to understand the burden that some of us have to live always facing the stereotypes of others and the danger that these stereotypes might cost us our lives,” wrote the 10 leaders of Churches Uniting in Christ in a statement released Wednesday.

“In humility, we invite the Body of Christ to join in serious self-examination about how our communities by our silence support racial profiling and stereotyping.”

CUIC called on churches to examine laws that may have contributed to the Feb. 26 death of Martin, a 17-year-old African-American who was unarmed. George Zimmerman, a neighborhood watch volunteer, admitted shooting Martin in Sanford, Fla., but law enforcement officials have not charged him, citing the state’s “Stand Your Ground” self-defense law.

“We cannot remain silent as our country once again struggles with the senseless killing of an unarmed young African-American boy,” the CUIC leaders said. “We write because we cannot remain silent at the continued ‘criminalization’ of black and brown peoples with laws that give license to people to shoot first and ask questions later.”

CUIC is composed of 10 mainline Protestant and historically black denominations, including the African Methodist Episcopal Church, the Episcopal Church, the United Methodist Church and others, with a special focus on overcoming racism.

Top leaders of the National Council of Churches also called for the aftermath of Martin’s death to be a time for introspection. “All of us — especially those who are white — must engage in urgent self-examination about the ways we react to persons we regard as ‘other,’” wrote NCC President Kathryn M. Lohre and Interim General Secretary Clare J. Chapman.

Some commentators have questioned whether white clergy took too long to add their voices to discussions about the case.

Although the Florida Council of Churches recently issued a statement about the case, “local white faith leaders have been missing from action in the movement for justice for nearly a month,” former Orlando Sentinel religion writer Mark Pinsky wrote in The Huffington Post.

For years, advocates for greater unity among Christian churches have wrung their hands amid talk of an “ecumenical winter.”

But now, 10 years after leaders took the first steps toward forming the broad-based group Christian Churches Together in the USA, some have hopes that U.S. churches may be entering a new season of closer relations.

At a recent CCT meeting in Memphis, Tenn., 85 Christians — Catholic, Protestant and Orthodox, white and nonwhite — made pilgrimages to historic sites of the civil rights movement. They also made plans to use next year’s 50th anniversary of the Rev. Martin Luther King Jr.’s Letter from a Birmingham Jail to pursue anti-poverty projects with houses of worship unlike their own.

“I would like to think of it as an ecumenical spring and that we do not yet know what will break forth,” said the Rev. Stephen J. Sidorak Jr., ecumenical staff officer of the United Methodist Church.

“I think that there’s the potential for the ecumenical movement to be more alive than it’s ever been because it will be more inclusive.”

In many ways, the movement that has grappled with theological differences, leadership struggles, finances — and even what to call itself — is in the midst of major down-sizing that they hope will lead to wider engagement:

— The National Council of Churches, the flagship agency of ecumenism, has shrunk from some 400 staffers in its heyday in the 1960s to fewer than 20. It is seeking a “transitional general secretary” after its executive, the Rev. Michael Kinnamon, stepped down on Dec. 31.

— Churches Uniting in Christ, a network that dates to the 1960s, closed its office doors in 2010 and one of its nine affiliated denominations — the African Methodist Episcopal Zion Church — has suspended its membership. CUIC’s remaining leaders hope to continue to address racism and shared ministries.

— CCT itself is looking for new leadership after its part-time executive director announced his retirement. Though it includes “families” of Catholic, Orthodox, historic and evangelical Protestant faiths, it has struggled to find acceptance among the “historic racial/ethnic” churches.

Ecumenical veterans say a movement that was built on slow-moving bureaucracies needs to find a way to stay nimble in the 21st century.

“It’s a little bit like keeping the post office running,” said the Rev. Wesley Granberg-Michaelson, the outgoing president of CCT’s historic Protestant family.

Part of the new approach includes a move away from the word “ecumenical.” Some Christians who had been hesitant about interchurch relations equate the word with liberal stances, or fear it could be linked to surrendering some of their theological distinctions.

“We’ve tried to shift away from that ecumenical language toward Christian unity language,” said the Rev. Richard Hamm, the retiring CCT executive director.

Neville Callam, the general secretary of the Baptist World Alliance, said some Baptists have bristled at the term. “Many still don’t like the word but many are growing into an understanding of the importance of the concept,” he said.

The presence of evangelicals — and particularly Pentecostals — is growing in the organized networks and ad hoc partnerships that develop over issues like poverty.

“If you take sex out of the equation in all of its expressions, it turns out that we actually have a lot in common as we look at issues,” said Hamm, the former president of the Christian Church (Disciples of Christ).

He and others point to the influence of the Circle of Protection, which last year urged Washington to maintain programs for the poor amid federal budget cuts. That initiative included the presidents of the NCC and the National Association of Evangelicals, as well as leaders of the U.S. Conference of Catholic Bishops and black and Hispanic groups.

“I would give priority to ecumenical meetings that are driven by mutual purpose rather than just getting together to talk,” said Leith Anderson, the president of the National Association of Evangelicals.

In the early days of his ecumenical work, the Rev. Cecil Robeck Jr. faced resistance from fellow Pentecostals. But later this month, the professor of church history and ecumenics at Fuller Theological Seminary will speak to executives of his Assemblies of God denomination about his interchurch experiences.

“God did something, I would say,” said Robeck, who was a keynoter at the CCT’s 2010 meeting that focused on evangelism.

Assemblies of God General Superintendent George Wood, however, said Robeck’s upcoming talk “is not an indicator regarding the Assemblies of God USA moving forward to membership in the ecumenical movement.”

While black church leaders have long been part of Churches Uniting in Christ, some are less interested in CCT. Christian Methodist Episcopal Church Senior Bishop Thomas Hoyt Jr. said it’s not a priority for his denomination.

“I think it’s so broad right now,” Hoyt said of CCT, where leaders “don’t vote on anything unless everybody can say yes to it.”

The Rev. Robina Winbush, president of Churches Uniting in Christ, said her organization is “wrestling” with how to conquer racial divides between Protestant denominations. Despite some “serious missteps” along the way, the ecumenical officer for the Presbyterian Church (USA) said CUIC remains part of the ecumenical movement because member churches demanded it.

“Primarily our lesson learned is that when you prematurely begin to dismantle something before the churches say that’s what they want to have happen, you have to spend the energy to put stuff back together,” she said.