The point of the cartoon, based on the description of the illustration, is the negative effect of unchecked immigration. The cartoon depicts "hordes" of new immigrants coming into the United States in a disorderly and dangerous fashion. This idea of immigrants making the United States a less safe and pleasant place is nothing new, and still exists today.
The cartoon's message is clearer when you look at the actual image. There is a sign at the harbour saying "Entry for Immigrants. Baggage the only Requisite", implying that regulation of immigration was too lax. The caption of the cartoon is :
"If Immigration was properly Restricted you would no longer be troubled with Anarchy, Socialism, the Mafia and such kindred evils!"
These messages make the point of the cartoon even clearer, but it can still be deduced from the description provided.
