Describing the Jєωs as being a "nation within nations" made more sense in previous centuries. But Western nations seem like Jєωιѕн nations, in which non-Jєωs are allowed to participate if they follow rules ultimately not of their own making. I don't view Jєωs as outsiders in Western nations. I view non-Jєωs as outsiders. This would include the indigenous of Europe.
So this term "nation within nations" doesn't quite work today.