Scores of professors have signed on to a letter criticizing a university president's opposition to marriage equality.

Matthew Holland, president of Utah Valley University (UVU), was among the “100 scholars of marriage” who signed an amicus brief in support of state bans on gay marriage in a case argued before the Supreme Court last month.

In the brief, attorney Gene Schaerr argues, among other things, that allowing gay couples to marry would lead to 900,000 additional abortions over the next 30 years.

In a letter to the editor published by the Salt Lake Tribune, dozens of current and former members of the UVU faculty and staff said Holland's involvement was “disappointing and harmful to the values at the core of our public university.”

“All of us, including our university president Matthew Holland, have the right to speak publicly as private citizens on controversial issues. However, as the public face of UVU to the larger community, Holland has a special responsibility to avoid public pronouncements that would harm his ability to carry out his duties as president of a state university officially committed to 'diversity and inclusion,'” the letter reads.

Holland stepped down from the board of the National Organization for Marriage (NOM) when he was picked to lead the university in 2009.