EU referendum, brexit and the aftermath

The question is really how to change from "fortress Europe / UK / USA / Australia etc. " to "welcome, come on in" because those return policies would not exist if the electorate rejects them.

You can’t. Most westerners see the first job of government to protect borders, the second to collect bins.

There might need to be an honest conversation about what constitutes a refugee (rather than deliberately making the process so cruel and dangerous). And certainly ending support/involvement in the regime change wars that make mass migration inevitable.