systematic and deliberate exporting of criminal classes across borders is no less harmful. neither of the big parties in US federal politics actually solve any problems, except the ones created by the other side.
none of this would matter if local jurisprudence were unbound from federal jurisprudence.
if there was no USA, and instead 51 nations, the picture would be radically different. in practice, this is how it works, but the feds create friction against the borders between states in favor of friction between federations. mexico is a federation also, let's be clear. the history of the region is replete with conflicts between the territories, between the toltecs and the aztecs and the mazatecs, and all the rest.