Garbage is a bit harsh of a word, but in reality that's exactly what they are.
This idea they are all these amazing and wonderful people coming here to conform to American society, learn English, work hard, pay taxes and magically become typical Americans soon as they cross the border is incredibly untrue.
These are all people born, raised and and taught by shitty societies in shitty countries. They will come here and continue being the same people from where they came from.
That's why they chose to enter America illegally. They didn't become legal citizens, they didn't learn English, they didn't take a citizenship test or any of that. They walked right in, which is a slap in the face to all the foreigners who made the effort to become legal citizens.
And what have they done? Nothing except use up America's time, money, resources, supplies and space. They came here to suck on America's tit and to trade a shitty life for a slightly less shitty life provided to them for nothing.