Bill, again, you make good points, it's just that, damn, I'd much rather be grateful for what I've got than blaming people who have less for their poor choices. If it were just poor choices, and not some luck of geography, resources, and history, then we'd end up sneering at all the countries in the world except, possibly, maybe who, China? Japan? UK, Germany, and who else? "The poor are poor because of choices they made" is a tough world view. I hope for your sake that karma is just a myth. 

So I wasn't going to respond, since most of what you say is hard to argue, but that last part, I can't resist ... let's see, why would any government resist such a wall? How strange of Mexico to object, right? Proves their bad intentions. And with how successful walls have been everywhere else (China, Berlin, for example), how odd that Mexicans should have doubts.