As far as I’m concerned, there is nothing problematic with what you’ve just said.  And there was no need to say that these things are “real” or “objective.”  Borders, to the extent that they do impact on human life, are seen as practical enactments—the border guard checking the passport is an embbodied practice that constitutes and causes the sovereign state.  The state has no concrete existence apart from these ongoing performances—or at least that is what a poststructural perspective would argue.