I think the decline of the Western birthrate quite possibly has been linked to the destruction, and outsourcing of virtually all of the industry of the Western countries. If these refugees aren’t welcomed with open arms, I think that may have something to do with it. (The idea that there aren’t jobs, or certainly not the well-paying jobs — and with limited education — that were once abundant.)
Of course, it is our “leaders” who caused the refugees by “shortsightedly” (at least according to official narrative which we should never believe, lol) bombing. I can see how having no youth in nations creates a lot of economic problems, but if there weren’t deep fears about the future — and if prospects hadn’t been limited compared to past (at least fairly recent) history — I’m not sure that there would even be a Western demographic crisis in the first place!