The anti-Mormon backlash after California voters overturned gay marriage last fall is similar to the intimidation of Southern blacks during the civil rights movement, a high-ranking Mormon says.

Elder Dallin Oaks referred to gay marriage as an “alleged civil right” in an address at Brigham Young University-Idaho that church officials described as a significant commentary on current threats to religious freedom.

Oaks suggested that atheists and others are seeking to intimidate people of faith and silence their voices in the public square, according to his prepared remarks. “The extent and nature of religious devotion in this nation is changing,” said Oaks, a member of the Quorum of the Twelve Apostles, a church governing body. “The tide of public opinion in favor of religion is receding, and this probably portends public pressures for laws that will impinge on religious freedom.”

Oaks’ address comes as gay-rights activists mount a legal challenge to Proposition 8, the ballot measure that overturned gay marriage in California. His comments about civil rights angered gay-rights supporters who consider the struggle to enact same-sex marriage laws as a major civil rights cause.

“Blacks were lynched and beaten and denied the right to vote by their government,” said Marc Solomon, marriage director for Equality California, which spearheaded the No on 8 campaign. “To compare that to criticism of Mormon leaders for encouraging people to give vast amounts of money to take away rights of a small minority group is illogical and deeply offensive.”

Solomon said the Mormon church hierarchy has every right to speak out, “but in the public sphere, one should expect that people will disagree.”

In an interview before his address, Oaks, a former Utah Supreme Court justice who clerked for Chief Justice Earl Warren at the U.S. Supreme Court, said he did not consider it provocative to compare the treatment of Mormons in the election’s aftermath to that of blacks in the civil rights era and said he stands by the analogy.

The Church of Jesus Christ of Latter-day Saints has shied from politics historically but was a key player in the pro-Proposition 8 coalition. The LDS First Presidency, its highest governing body, announced its support for Proposition 8 in a letter read at every California congregation, and individual Mormons heeded the church’s calls to donate their money and time.

After the measure prevailed, its opponents focused much of their ire on Mormons, organizing boycotts of businesses with LDS ties and protests at Mormon worship places. While some demonstrations were peaceful, in others church windows were shattered and slurs were hurled at the church’s founding fathers.

“Those who seek to change the foundation of marriage should not be allowed to pretend that those who defend the ancient order are trampling on civil rights,” Oaks said.

In his address, Oaks also rejected any religious test for public office. He said that if “a candidate is seen to be rejected at the ballot box primarily because of religious belief or affiliation, the precious free exercise of religion is weakened at its foundation.” Oaks said he was referring in part to the 2008 presidential bid of former Massachusetts Gov. Mitt Romney, whose Mormon faith troubled some evangelicals.