Mars Adema, 40, said she had tried over the past year to convince the church’s ministries to care for immigrants, only to hear that “this is just not our focus.”

“With Afghanistan, something completely shifted,” Ms. Adema said.

In a nation that is polarized on issues from abortion to the coronavirus pandemic, Afghan refugees have cleaved a special place for many Americans, especially those who worked for U.S. forces and NGOs, or who otherwise aided the U.S. effort to free Afghanistan from the Taliban.

The moment stands in contrast to the last four years when the country, led by a president who restricted immigration and enacted a ban on travel from several majority-Muslim countries, was split over whether to welcome or shun people seeking safe haven. And with much of the electorate still deeply divided over immigration, the durability of the present welcome mat remains unknown.