"Jacquelline Fuller did the right thing by resigning from the board of an organization whose values don't align with Google's commitment to inclusivity and equality," Michael Sherrard, director of Faithful America, said in a statement. "Now it's time for John Park to follow suit."
Taking a softer position, some progressive Christians wrote in a letter released Wednesday that they grieve World Vision's reversal. "And we call on Christian institutions to employ LGBT brothers and sisters in Christ who help further the mission of their institutions," the letter states, acknowledging disagreements on both sides.
"There are committed Christians who believe, honestly, that a few passages in the Bible referencing sexual activity between people of the same gender have been historically misconstrued," the signers say. "There are also committed Christians who believe, honestly, that homosexuality is sinful and flies in the face of what God desires."
More than 300 signers include theologian Walter Brueggemann, Dartmouth College historian Randall Balmer, Louisville Seminary theology professor Amy Plantinga Pauw, Yale University emeritus professor Nick Wolterstorff and pastor Brian McLaren.
"I would like the world to know that there are many Christians who support the hiring of gay Christians in Christian institutions," said Julia Stronks, a political science professor at Whitworth University who organized the letter. Whitworth is an evangelical university based in Spokane, Wash.
In many ways, the issue harks back to other hot-button issues, many of them related to sex and gender. Christians have debated whether an evangelical could get divorced, support the right to an abortion or allow a woman to lead a church.
When announcing the reversal, World Vision President Rich Stearns hinted that the decision centered on whether sexuality was a core part of Christian beliefs.
"What we are affirming is there are certain beliefs that are so core to our Trinitarian stance," Stearns said, "we cannot defer to frankly a small minority of churches that have taken a different position."
But those who signed the letter said sexuality is not a core belief.
"The core issues for the Christian faith are that Jesus Christ, the son of God, died for our sins," said Stronks, who noted her family will renew its child sponsorship despite the controversy. "I understand that for many Christians, identifying sin is important and difficult. But these things are not central to what it means to follow Christ."
In a blog post for The Gospel Coalition, LifeWay Christian Resources employee Trevin Wax asked: "Can an institution with an historic evangelical identity be divided on an issue as central as marriage and family and still be evangelical?"
Tolerating same-sex marriage and same-sex behavior is a rebellion from biblical Christianity, wrote Christian Post executive editor Richard Land, former head of the Southern Baptist Convention's Ethics and Religious Liberty Commission.
"World Vision's board has discovered an essential truth: the same-sex marriage issue is a truth serum for evangelical Christianity," he wrote. "As World Vision has learned, evangelicals cannot declare 'neutrality' on this issue, and it cannot be fudged or finessed."
The change caused some evangelicals to consider how they religiously self-identify.
A World Vision spokesman told RNS that the organization is still estimating how many it has lost and gained in recent weeks, but it estimates that 10,000 sponsorships have been dropped. After a call with World Vision's Stearns, blogger Nish Weiseth wrote about how watching evangelicals drop their support impacted her faith.