From your view, does a sovereign country have the right to sovereign borders? Does a sovereign country have the right to regulate who is permitted in to the country for the safety of it's citizens and the stability of the country?

Does Catholic social teaching in your view, mean that Catholics must call for and embrace open borders? 

From your view: if I go to Mexico or any other Latin or South American country illegally, and I get caught and they deport me, are they morally justified in doing so?