Comparing today's illegal immigrants to the immigrants of yesteryear is a flawed analogy. First, up until recently there was no welfare, no free schooling, no medicare, no food stamps. The people who came to America before then came to work or to starve, there were no "welfare queens". Secondly, previous waves of immigrants were made up of people who came from many different places, many different cultures and spoke many different languages. This forced them to assimilate into the common culture. The immigration from Mexico/Central America is totally different, they all come from a common culture (Hispanic), speak a common language (Spanish) and come across a common 3000 mile long border. They have no reason to assimilate.