Sweden is a better example. Incredible parental support, high birth rates compared to the rest of Europe.
(Personally, I don’t think high birth rates are a good thing. The long term survival of our species depends on curtailing global population. But that’s a different subject.)
Germany has very good support for parents, and has been working hard to reverse the downwards fertility trend. Some progress is showing. (Note that I don’t disagree that Sweden is doing better.)
How many African and Middle Eastern immigrants do you think the US currently has?
I'll give you a hint - it's quite a lot less than the number of Mormons in the US. Who are a group significantly whiter than the US general population, and with higher birth rates to boot.