The refugee invasion is about money, my friend. Governments are essentially backed by corporations and banks. The importation of disenfranchised people willing to work harder for less wages.

If it were about "low birth rates", why not fix one's country up to where your natives could procreate and thrive instead of injecting thousands and thousands of people non-conformative or detrimental to the existing culture? Because migrants are a cheaper workforce. And any loss of wages that would ruin the ability to support a living can be subsidized through civic programs like welfare benefits, meaning the corporate oligarchy has less overhead since that comes out of taxpayers' pockets, not theirs.

At the end of the day, the continued accumulation of wealth is often the thinly-veiled catalyst behind most social upheaval and the erosion of western values.