IT is no secret that Donald J. Trump’s ruinous rise in the Republican presidential primaries has been powered, in large part, by a naked agenda of religious division and fear-mongering — an agenda that will likely inform his speech today at Liberty University, a conservative Christian college in Lynchburg, Va.

But while his anti-Muslim provocations have rightly drawn the largest share of public outrage, Mr. Trump has in fact been using his bully pulpit throughout this election season to attack religious minorities of all stripes. He deploys this tactic on the campaign trail whenever it suits his political purposes, and his religious digs and dog whistles are often so cartoonishly retro that they sound as if they’re being delivered by a billionaire Archie Bunker.

In the Gospel According to Trump, there is only one blessedly normal, all-American faith: mainline Protestant Christianity. The Presbyterians, the Methodists, the Baptists — those believers who once made up this country’s midcentury religious mainstream — are Mr. Trump’s “chosen ones.” He regards their customs and values as essentially as American as apple pie, while all other faith communities, even other forms of Christianity, seem to rest somewhere on a spectrum from exotic to sinister.

Take Mr. Trump’s bizarre speech last month to the Republican Jewish Coalition, where he kept inexplicably returning to the same well-worn tropes that anti-Semites have been using for a century. “I’m a negotiator, like you folks,” he proclaimed to the crowd. Later, he sought to signal defiant distance from the Republican establishment by informing them: “You’re not going to support me because I don’t want your money.”