Except that this is hardly universally true in this country, especially in largely immigrant locales in which the dominant language, or languages, is/are not English. And that phenomenon was also true in late 19th century America which characterized large waves of immigration and in many cases low levels of English fluency & literacy (like today). Here is the difference, however: For any earlier-era immigrant to contribute fully to the country, it was necessary for them to learn English, not to be taught in public schools in their native tongue, not to have every document translated to them in their native tongue (as many as 14 such languages in some locations), etc. None of the latter encourages learning English.
It was once true (earlier era) that First Generation raised in this country was remarkably unlike – in literacy, in education, in job skills – what characterized their immigrant parents. This phenomenon is increasingly vanishing.
And when the immigration is illegal rather than legal, the control of the flow vanishes. The combination of massive numbers of non-English-speaking immigrants of particular national & linguistic origins, combined with the modern era’s catering to that linguistic-status-quo by governmental regulation, combined with economic conditions, geographically, which allow a completely non-English-speaking commercial base, results in low motivation to learn English and low quality of any such learning.
Correct. (Not what happened to your grandfather.)