"... You can look at this however you'd like, but there is an underlying and very-seriously negative problem in here that nobody wants to acknowledge: If we do not address not only the rate but the balance of who's having kids and what they're inculcating in those kids we're screwed, and we do not have years or decades to do it either.Simply put, only the productive children -- that is, those who grow up and then produce more than they consume can keep a society going. Some percentage of children are never going to be productive and for those who are unproductive simply due to bad luck it's not their fault nor that of their parents -- fortune just is that way, and a just society doesn't treat them like a deformed puppy and cull them."
But you cannot make up for the lack of said productive children in your society by throwing open the borders and inviting "everyone" in. Those who come here with their first act as a criminal one are demonstrably unfit right up front to fit into a social order that has "law-abiding" as any part of its requirement. Oh sure, some will change their minds but their general mental position, which is "screw the law, I want mine" is not one you can permit on a mass-basis if you want to have a society at all.