Many people here including parent commenter argue for rule of law, which includes controlling and protecting the border and deporting illegal aliens as written in the law. However, those same people (not necessarily parent commenter, but probably the case also) argue for an uncontrolled anarchistic border and presence of foreign nationals in the same breath.
This is why I am of the mind that the only standard the Left has is the lack of standards. Rule of law, except not those laws.