"We are not criminals!"
I hear illegal immigrants making this statement during every protest. That statement is absurd. Every illegal immigrant is a criminal.
There are several federal laws regarding immigration. If you do not follow any one of those laws then you have committed a crime. If you habitually commit crimes, then you are a criminal.
Therefore if you continue to break the law, as is the case with an illegal immigrant being in the U.S. day after day, then you are indeed a criminal.
Note that employers who knowingly hire illegal immigrants are also criminals because they break laws which prohibit this activity.