It is not that necessary to use force.There are Republicans out there who want to see illegals removed by force. That obviously results in large scale violence, the consequences of which would resemble Germany. I mean, what else is going to happen if we anachronistically apply force to relocate 20 million people?
Whether the pot boils over to this predictable crescendo is another matter. Most folks are all bark and no bite. They are also deluded into thinking their position is more popular than it really is. Many people would think I back the use of force, for example. I most certainly do not.
Still, if you want to avoid all this risk of brooding violence, simply pull the rug out from under them. Build a god damn border fence, place the military on the border, SEAL THE BORDER. Consider it a peace divined, the cost of avoiding 1930s Germany.
We can work on achieving integration if there won't be 50+ million more of them down the road. Until the border is sealed, all bets of a peaceful resolution are off.
Simply make life as difficult as possible for them.
1.) Remove citizenship for children born to illegal immigrants.
2.) Allow checking legal status before a student can be enrolled in school
3.) Make it harder to obtain employment
4.) Disallow all government benefits
5.) Arrest those who drive around in buses proclaiming their illegal status.
6.) Insert an RFID chip into anyone caught and deported, so you can detect if they come across the border again.