Rhetoric aside, every developed country has an immigration system, and the function is the same everywhere. The principal function is to manage the cultural and

Rhetoric aside, every developed country has an immigration system, and the function is the same everywhere. The principal function is to manage the cultural and economic impact of immigration by controlling total immigrant numbers and filtering for more desirable immigrants. Filtering out criminals is an extreme case of it, but that’s not the be-all-end-all of the immigration system.