Which is why there should be HARSH penalties for those caught here illegally repeatedly. Not prison, but work camps in snake filled swamps, logging with axes perhaps.
Should those caught with possession of marijuana be sent to work camps? Do you believe that sending drug offenders to work camps would 'win' the War on Drugs?
The act of migration is by itself no crime. So long as there is demand for people to come here or demand for migrant labour then we will see migration. Adding work camps or taller fences won't end it. It will merely increase the amount of violence involved.
A migrant must find work, a home, and enter into countless other
voluntary relationships in order to migrate here. Why do you believe you have the moral authority to decide what relationships others get into? As long as the relationship is voluntary there isn't any room to intervene.
You are free to not associate with illegal aliens, in the same manner that you are free to not associate with people who are homosexual, or Greek descent, or who support the Lakers. If there was a
demand, in the economic sense, for people to not associate with illegal aliens I am sure we'd see businesses provide for that option. We might see stickers on fruit saying that it was grown on a farm where all the workers were US citizens or legal migrants. Curiously I've yet to see such stickers.
You are not however free to intervene in what third parties do. If Sally from down the street wants to hire an illegal alien to do yard work, that is the business of Sally and any illegals who are willing to do the work. It isn't your business. It isn't Obama's business. Nor is it your business if Sally wants to marry an illegal.
You can refuse to attend the wedding. You can refuse to hire the illegal's yard services. You are not however free to get a gun and force Sally to stop associating with someone.