So, full disclosure, I do watch the Lotus Eaters podcast.

That said, I'm pretty sure that Sargon's "zero immigration" policy idea is specific to the UK. For about two plus decades, the UK has been receiving absolutely insane amounts of both legal and illegal immigration, which is absolutely not sustainable for a relatively small island nation.

He's stated a number of times on his segments that his best-case is to stop immigration entirely, kick out the illegals, fix the ever-ballooning national spending apparatus (like the NHS), and balance the economy to the point where British citizens can afford to buy houses again without bulldozing the entire country into Megacity One.

I can certainly support that viewpoint; I can't imagine "stop importing people, we're full" as an extremist position.