Regarding my prior post, I think that the borders debate can be condensed even further. Are the restrictionists wrong because they a) apply the wrong principles logically, b) apply the right principles illogically, or c) because open borders advocates are offended by restrictionist policy?
If a), the open borders crowd needs to show why the (often implicit) principles upon which restrictionist arguments are founded are wrong. If b), the open borders crowd needs to show how the restrictionists went awry in their thinking. If c), though, who cares?