@Advocate,
Advocate, Trying to apply the statement of anyone from an entirely different period in our country's life can have a grain of truth in it, but all one needs to do is look at what transpired since he spoke those words.
The America of today has immigrants from most countries around the world, and not all end up learning English as their primary language even after they swear allegiance to the US. Some cultures continue speaking their native tongue - especially with their children and friends, and many work in businesses that serve their community at-large.
Here in Silicon Valley, there are many from foreign countries, and we have whole strip malls that cater to their culture in addition to the integrated ones.
Many fly the flag of their native country, and many remain proud of their backgrounds. I see nothing wrong with that.