There are two statistics that explain the Democrat obsession with illegal immigration and open borders.
97% of immigrants in the appropriate grouping identify themselves as Hispanic, but by the fourth generation that number falls to half. Only 7% of immigrants describe themselves as Americans, but 56% in the third generation call themselves Americans. Even the use of Spanish is slowly declining.
If a minority stops existing after a few generations, did it ever actually exist?
The Democrats had abandoned their working class base to chase what they pretended was a racial group when what they were actually chasing was the momentum of unlimited migration.