Germany has technically always been multicultural, in a sense because of regional al differences (Bavarians, Schwabians, Hessians, Prussians, Saxons, Silesians, etc), while still being homogeneous in an absolute sense. Dittto with the UK. And yeah Scots and English have had their disagreements, but have still been able to coalesce into a coherent nation state because they have more in common. Not so with the multi cultivar bag of party favors you lefties are pushing. So yeah there is some inter group adversarial dynamics in these examples, but it still works. This will not.