Space and wages of course. In Germany you are a bank slave for your entire live if you want to buy a house. Meanwhile rich people from all over the world buy up prime real estate.

Their globalist friends want more immigration to drive down wages and increase rents.

This is nothing at all like in the U.S. The U.S. is huge and I'm green with envy when I see YouTubers owning whole estates in Idaho to make their private aircraft videos. Such things are completely impossible in Germany.

Then there is the cultural aspect of course. The U.S. has been an immigration country from the start. Europe had diverse hand highly advanced cultures in music, paintings, literature etc. Frankly, since the Americanization following WW2 neither Europe nor the U.S. have produced anything comparable.

What you call ethnostate, which is a derogatory term, other people call culture.