Gangs of New York was simply a current, popular fictional reference to a historical truth.
Throughout US History, new groups were often seen as “the other”.
Happens all over the world.
Europe has their Polish Plumber, England has their Paki cab driver, and America has their Mexican Landscaper.
I get that you are trying to push immigration, besides that and polygamy, and homosexual marriage, what other positions do you share with the Libertarian Party, all of them?