The illegals are not immigrants, they are colonists. They are not coming here to become part of "us," they want to remain "them," but take advantage of "us." They don't bother to learn English, they don't adopt our customs, they don't assimilate. They stay "foreigners" in our country.
It's nonsense to say that the economy will suffer if they are deported. The slaveholders of the Old South made the same argument. It was wrong then, and it's wrong now.
They sure as heck aren't the migrants of my youth. Back then they came to work and many of them came to build a record of goodwill with America with hopes of citizenship.
Today they come as conquerors.
In 20 years we'll be electing a president for life who wants to be called "General".