Okay, in all seriousness, the EU was the first "DACA", the first recognition that people were moving around Europe (especially from post Communist countries) and they'd either need to be deported or another solution that would allow them to remain legally.

DACA should really be called the South American Immigrant solution. What to do with all the Mexicans and others from South America? But I'm no expert. Anyway, all the same to me.

The property owners of the "West", of the 1980s wanted them in when their economies were on fire, and now wants them out, with growth cooling, if not reversing.

Hope this explains why DACA is just another shorthand for "We'll make it so some of you can stay (but only so we can keep the rest of you out) ;) Brexit was stupid. But in the end, if everyone is going to do it, perhaps smart to rip the band-aid off now.