The largest conference of Mennonite congregations in the U.S. has officially split from the Mennonite community Monday over concerns that the wider church is beginning to affirm LGBT lifestyles.

The Lancaster Mennonite Conference (LMC) had voted to leave the Mennonite Church USA (MC USA) in 2015, and the decision became effective January 1, 2018.

The LMC, comprised of 179 congregations in New York, Pennsylvania and Ohio, left over the definition of marriage and the sinfulness of homosexuality, according to a report from Religion News Service.

A pastor for one of the LMC congregations told NPR back when the vote to split took place it was actually the MC USA that had departed from Biblical teaching.

“We are in a sense not really leaving,” said Steve Olivieri, pastor of Cornerstone Fellowship of Mill Run in Altoona, Penn. “They are the ones that essentially have left true biblical Christianity in this respect.”

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