There's only so many ways an idea can be rephrased to accommodate those having difficulty understanding it before eventually it just becomes appropriate to say "fuck it, figure it out on your own because I'm done trying". I even briefly covered a watered down version his point in the very post you replied to (hint, it's the entire 2nd paragraph).
Again, if that's not enough to point you in the right direction, then there are deeper issues here than a logical debate on the facets of immigration policy.
Edit: typo