I don't think there are many self-claimed libertarians actually voice for open-borders. It is just an extension of interpretation out of the theorists. Limited

I don't think there are many self-claimed libertarians actually voice for open-borders. It is just an extension of interpretation out of the theorists. Limited government doesn't mean a complete denial of necessary national governance. It can be easily argued that void of such governance isn't in the interests of those libertarian ideals.