Do you really believe this..?
What if I told you that reality tends to differ from the thirty second sound bites you are shown on television?
Look most people want to do what they think is right. Some people don't think that making lives harder for the poor in order to have a strange boarder less country is worth it. There are other better ways to treat this problem but there is zero political will on either side to explore any option beyond the use of force.
Ideally we would have such massive fines for companies caught hiring illegal immigrants that it would be utterly destructive for any business or corporation to do.