They grouped together because there might be jobs in the small neighborhood for them and since most knew little or no English, it was easier to find adapt to the new culture. One thing is certain, it was much easier to migrate from another country to America in the 18th century than it is today. Like today, where you have laws and policies to restrict the flow of newcomers and make it more burdensome to obtain citizenship on behalf of a limited number of immigrants from each county. The common thing between them is that everyone wants to go to the United States, but is there enough to go there ?