Population cannot and will not grow indefinitely and that a lower global population is probably our best chance to continue to live on the planet in a non-dystopian way along with a thriving natural environment.

So dealing with a stagnating to slightly decreasing population will happen at some point, anyway. It's just that by kicking the can down the road by encouraging immigration for short term economic "gains" we will also have destroyed our identities, cultures, and people.

Europe has probably passed the point of no return at this point.