Do you know what criminal means?  The amount of time you and your ilk spend accusing others of it, you might want to actually understand what you're saying.

In order to be a crime, an activity must be explicitly prohibited by a criminal statute which imposes criminal penalties.  There are any number of actions which are violations of laws which are not crimes.  Among them, being in this country without proper documentation.  An individual who overstays a visa has not committed a crime (and if you're going to argue this point, please do include a citation to the offense being committed in the criminal code)

All of which is beside the point, which is that there is no indication these kids are here illegally anyway.  It's just another racist assumption.