That operation was not handled in an humane manner. The troops were pretty much using strong arm tactics and it did not set well with citizens.
The problem we have today is the government is not deporting apprehended illegals. Simple fact.
Search operation wetback to read more to get the full picture.

Well, name any legal citizen that honestly would choose to work in 100 degree weather, just so you ca put food on your table. And f Jesus was alive and came to Amerca, would you deport him too. Those illegals from the past help build our train system here in Ca. But a lot people do not know that. You should read your history and know because of those illegals, we have a wonderful railroad system.
And they are also hardworking people period. Go ahead send them all back and see who volunteers to pick your fruits and vegetables in the summer. I bet you won't sign up right?