Earlier quoted context omitted.
When you are far removed from everything, your logic doesn't always make sense. The problem with local workforce is that you have less threats hanging over their heads. Ones you can threaten with deportation, separation from their children, or just shoot in the streets, are just more controllable. Imported labour has less rights and will be more open to grovelling.
you still need local country to be attractive enough to make people come and fear of deportation, meaning locals will be Ok too.
1. These people are detached from reality.
They would never see water that can be ignited because of the contamination so don't know the scale of their actions. Or
2. They think they have enough power to make the other countries worse, pressure on the EU, bombing the middle east, that making life worse for locals is offset.