As long as everybody is nationalist (not to say racist) and keeps borders closed to protect the homeland, those differences matter. Realizing that one thing people get worked up about (immigration) is a solution to the other thing they get worked up about (not enough kids!!1) would be a great insight.
Yes, but no one is really complaining about "not enough kids." They are complaining about not enough kids of their preferred skin tone. So they see immigration as an exacerbation.
I can't help but agree here. "Declining birth rate in the western world" just comes across as a dog-whistle to me. I guess I kind of only alluded to this myself with my response that they were being "weirdly cagey", and I wish I had been more direct like you were willing to, so thank you for this
Well, they were directly asked what they meant and replied with a link to a giant Wikipedia article. If they had a more specific point to make, they're being weirdly cagey about it.