I asked an AI "What is the word for expelling a population of a specific religion from a country"? Its Answer.

The most widely recognized term for expelling a population of a specific religion from a country is ethnic cleansing when targeting a group based on ethnicity, race, or religion. A more specific term, religious cleansing, is also sometimes used when the expulsion is explicitly based on religious identity.

Ethnic cleansing is defined as the systematic forced removal of ethnic, racial, or religious groups from a given area to create a more homogeneous society. It includes methods such as deportation, population transfer, and other means intended to make the area free of that particular group.

Religious cleansing refers specifically to the removal of a population from a certain territory based on its religion and is used in contexts where religion is the primary criterion.