Whilst I understand your point that "Nation-states can also be democratic. They can adopt a policy encouraging immigration, such as the Law of Return".............the Law of Return is de facto an extremely racist law, especially when it is the ONLY standard used to justify immigration status and therefore citizenship. A more open standard would be much more in line with the concept of democracy.
Israeli teen lightly wounded from stone throwing in West Bank settlement of Kiryat Arba (Haaretz)
from the article: Not just for Jews