I agree, petty nationalist ethnonationalism is a zero sum game, and ethnonationalists really do not understand how their vaunted “sovereignty” is guaranteed by other, larger powers. In a future ethnonationalist Europe, who will guarantee the sovereignty of, say, Estonia? Yes, I guess Estonia could develop their own little nuclear arsenal (*), but, really, the existence of an ethnonationalist Estonia would be guaranteed by whatever security arrangements exist among European states, which means they would give up some sovereignty for a collective defense arrangement.
Also, Spencer’s overall take on foreign affairs is simply good common sense. It’s a shame Spencer is wasting himself with the Pepian Alt Right jackasses.
*Actually a good idea. I’m a pro-proliferationist. More nuclear weapons – at least in the hands of sane states – can help keep the peace. And each nation that has such weapons should be upgrading, not downsizing. The American trend of fewer such weapons, and smaller yields (no, against extreme hardened targets or large “soft” targets, “improved accuracy” cannot compensate for popgun sized yields), is madness.