Mexican companies working to build Trump's border wall are 'traitors,' says top archdiocese.

The Catholic Archdiocese of Mexico said on Sunday that Mexican companies interested in working on U.S. President Donald Trump's border wall should be considered as traitors to their own country.

In an editorial titled "Treason against the Homeland," the archdiocese noted that several Mexican companies have expressed plans to supply materials or help build the proposed wall.

The archdiocese sought to pressure the Mexican government to take a tougher stance against companies that are willing to profit from the border wall.

"Any company that intends to invest in the fanatic Trump wall would be immoral, but above all, their owners and shareholders will be considered traitors to the homeland," said the editorial published in the Archdiocese's weekly publication Desde la Fe.

Economy Secretary Ildefonso Guajardo stated in a meeting with steel companies last week that the government has no plans in enforcing restrictions against businesses. However, he warned that the companies will be judged by Mexicans who will base their future buying decisions on "which brands are loyal to the national identity, and which are not."

"I think your prestige will align with your own interests in not participating in the wall," he told the steel companies, according to The Associated Press.

Trump has previously stated that Mexico would pay for the proposed wall, but the Mexican government denied that it will do so.

The editorial, which was published online, warned that the barrier would only feed prejudice and discrimination.

"In practice, signing up for a project that is a serious affront to dignity is shooting yourself in the foot," it stated.

It is unclear exactly how many Mexican companies are interested in building the wall, but Grupo Cementos de Chihuahua, a company specializing in construction materials, has expressed its willingness to work on the project. Mexican cement maker Cemex stated that it could provide quotes for raw materials for the wall but noted that it will not participate in the bidding process.

Meanwhile, California Governor Jerry Brown also expressed his opposition to the barrier, saying it is not a "Christian thing" to build it in order to stop undocumented immigrants from entering the U.S. In an interview with NBC's "Meet the Press" on Sunday, the governor said that the immigrants are "children of God," and "They should be treated that way."