I would literally have all non-White children sterilized.
Every fucking one of them.
We start with jews, niggers, and dirt-bloods infesting White countries.
Then hit Central America.
After we get their futures sorted, we start with North Africa and the Arabian peninsula.
Then we move to sub-Saharan Africa, where most of the garbage by head count comes from.
That undercuts the Chinese goblins for Us.
So next comes South America.
And fucking India has no idea what is doing, so we do them last.
Im willing to start with "stop funding them or their failed countries" that should solve about 90% of the problem without bothering with the rest.
Also, the border(s) being a DMZ on the likes of israel. Let's start there. It will only take 10-15 years for the majority of the problem to go away.
Oh, and it goes without saying that mass deportations including the "fake birth right" illegals going with them.