What is to be done about ILLEGAL ALIENS ?

In some ways militant socialism is like high school Euclidean Geometry: you go where the axioms, assumptions, and definitions lead.President Abraham Lincoln sharpened his political thinking by studying Euclid.
Now just what did young Karl Marx mean when he said in the famous Communist Manifesto: " the workers of the world have no country " ? It means that socialist workers must have a friendly attitude toward " foreign " workers.
What is to be done here ? Organize the unorganized !