Undocumented immigrants will remake U.S. society and politics in the coming years, a Mexican priest who advocates on behalf of Central American migrants said.

“They are becoming a hidden, silent revolution that will re-build the United States and transform it into a true democracy,” the Rev. Alejandro Solalinde told Efe at the Guadalajara International Film Festival, which is screening a documentary about the priest’s migrant shelter in the southern Mexican state of Oaxaca.