Congratulations on the STUPIDEST question ever posted on FR, troll.
Being inside the borders of the United States of America without proper authorization constitutes illegal entry. A person being so is an illegal alien.
Only a complete and total MORON would spout the DU talking point "no person is illegal" which we see from signs held by INVADERS FROM ANOTHER COUNTRY who have the INCREDIBLE AFFRONTERY to DEMAND "rights" for lawbreakers.
Go back to DU, troll.
I can understand an illegal act, however I cannot understand an illegal human. You might stop and think about my question before you kneejerk.
And when you do, explain why one person crossing a border is considered legal while another is not. What is the criteria?