So first of all, thank you for the civil discussion because that is the biggest lacking quality of scored comment sections like this site. It seems like discussion always brings details that are helpful when we are condemning an entire country with little information provided. This is why I like discussion and not militant downvoting and personal attacks.
I truly have no narrative here but I just searched for immigrant literacy and the first thing I found:
“41 percent of immigrants score at or below the lowest level of English literacy — a level variously described as “below basic” or “functional illiteracy”.”