GOP presidential front-runner Donald Trump should not have been invited to speak at Liberty University, because, according to a three-time alumnus of the Christian university, Trump’s profession of faith is not believable.

In a public Facebook post, Joel Ready said that while he normally encourages his alma mater to invite those with “diverse points of” conversation to the school’s mandatory convocation — such as Democratic presidential candidates Sen. Bernie Sanders and former Secretary of State Hillary Clinton — he is “deeply disappointed” that Trump is scheduled to speak Jan. 18.

“The difference with Trump is that he claims to share our values, and even claims to be a Christian,” Ready said, citing 1 Corinthians 5:9-13, a Biblical passage in which the apostle Paul admonished against “associating anyone who claims to be a brother or sister” of faith but does not actually act as one.

Donald Trump, president and chief executive of Trump Organization Inc. and 2016 Republican presidential candidate, holds up a Bible while speaking at the Values Voter Summit in Washington, D.C., U.S., on Friday, Sept. 25, 2015. The annual event, organized by the Family Research Council, gives presidential contenders a chance to address a conservative Christian audience in the crowded Republican primary contest. Photographer: Drew Angerer/Bloomberg via Getty Images

GOP presidential candidate Donald Trump holds up a Bible while speaking at the Values Voter Summit in Washington, D.C., Sept. 25, 2015. (Drew Angerer/Bloomberg via Getty Images)

“Trump is the grotesque personification of everything that is wrong with American political discourse, and his repeated claims that he is a Christian should disqualify him from speaking at Liberty,” Ready said. “I wish I believed that Liberty would make an effort to engage him on his contradictory stances, his recent financial and political support of Planned Parenthood, his unapologetic serial monogamy, how he built much of his fortune by preying on the addictions of the weak in his casinos or perhaps his godless views that he shared so gleefully the last time he was at Liberty to speak.”

Trump has said he is a Presbyterian.

According to McClatchy, Liberty University President Jerry Falwell Jr. and his wife have been in “close contact” with the bombastic business mogul since he last spoke at the venerable Christian university in 2012. Falwell said Trump also called him after the university president appeared on Fox News’ “Hannity” when he defended his call for more concealed carry permits in the wake of the San Bernardino attacks.

During that segment, Falwell said his three favorite presidential candidates were Trump, retired neurosurgeon Ben Carson and Texas Sen. Ted Cruz.

Read Ready’s post, which has been gaining traction on social media, in full below.

I'm deeply disappointed to hear that Liberty University has invited Donald Trump to speak at convocation. Don't get me…

Posted by Joel Ready on Tuesday, January 5, 2016