Each of these would and is causing uproar in every country or region that introduced or tried to introduce similar laws. And the last one is plain impossible to

Each of these would and is causing uproar in every country or region that introduced or tried to introduce similar laws. And the last one is plain impossible to realize. How do you even approach limiting immigration in the modern world? I'd argue a lot could be done by revitalizing deserted areas, where houses exist but people are gone. Usually there is one primary cause: find it and try to find a solution, even if it takes years.