The Pope has suggested

A person who thinks only about building walls, wherever they may be, and not building bridges, is not Christian,… This is not in the Gospel.

Pope Francis, asked about Trump's border wall, says fear of migration is "making us crazy"

Pope Francis, long-critical of Trump's immigration policies, speaks out again during visit to Central America

www.cbsnews.com

In addition to the Pope, there was a recent NPR interview about the theological debate about the wall.

The Moral Question Of Trump's Border Wall

NPR's Michel Martin talks with Shaun Casey, director of Georgetown University's Berkley Center for Religion, Peace and World Affairs, about the theological debate over President Trump's proposed wall.

NPR.org

Meanwhile the White House pushes against the “immorality” of the wall.

God 'wanted Trump to become president,' Sarah Sanders says

Donald Trump was chosen by God to be president in 2016, White House Press Secretary Sarah Sanders told the Christian Broadcasting Network (CBN) on Wednesday.

CNBC