I drive to work every day along a highway.Is it fair to deport people for breaking a law we ourselves were not taking seriously?
There is a police officer radar tracking traffic nearly every day.
I speed by every day and am never pulled over.
But one day I am.
I broke the law. I knew it and continued in violation.
Eventually I was caught and given a ticket.
It does not matter if I could get away with it before or not, the law is the law and I continued in violation of it.
These people likewise knew the law.
These people likewise continued in full knowledge that they were in violation.