"Undocumented" means "illegal."  It means breaking the law to be here.  So, yes, I do not wish lawbreakers peaceful slumbers.  And I expect them to be caught.  We are a country of law, not men; you do not have the option to decide which laws are insufficiently important to ignore and which ones are not.  That makes us then like the banana republics with their caudillos and their caudillo parties from which these people fled.