The Religion Test

Adam did not give a cite for this clip, but it looks like it came from this ABC article (or another one quoting it).  At any rate, I think I can answer the question.  I saw it in a movie one time - might have been Name of the Rose - and as I recall, you stick a stilleto into the person in question through a mole or other skin blemish.  If they cry out, they're not true Christians.  We can just go back to the days of Torquemada to Make America Great Grate Again.

"This is all uncharted territory," said Austin-based immigration lawyer Jason Finkelman. "We’re all trying to figure out what’s going on."

[...]

[Sam Witten, a 22-year veteran of the State Department and principle deputy assistant secretary of state for refugee programs from 2007 to 2010] echoed that sentiment, saying that DHS and the State Department are already so "thorough" and "careful," calling the vetting process in place already "very extensive."

[...]

"In general, those of us who work in the refugee process believe the vetting is so intensive and lengthy and extreme that there is unlikely to be a significant level of fraud," Gilman said.

[...]

"No one wants a refugee to come into the country who would threaten national security," he said.

[...]

[Denise Gilman, director of the Immigration Clinic at the University of Texas Law School] expressed concern over Trump's intention to prioritize Christian refugees because the program is "set up to give protection to those in gravest need."

[...]

The vetting process is already so "extreme," that Finkelman said he doesn't know how much more extreme it can get.

  ABC

Making them pass a religion test is how.

While DHS officers can ask refugee applicants whatever questions they feel are appropriate, typically, interview questions are heavily security-related, Witten said. Going forward, each DHS interviewer will be tasked "to ask enough questions to figure out -- to their satisfaction -- whether the person meets the requirement that the president is imposing -- that they are a Christian," Witten speculated.

This is heinous.