European and most Asian immigrants had a skill or trade...they were barbers, shoe makers, bartenders, etc. ...
Also not true.
Hey troll....everybody knows you're a miserable old fraud who has no friends here or IRL....welcome to being on IGNORE.
Nice emoting, I'll tell my friends about it. Now then, the FACT is that during periods of high European immigration to America, most were unskilled. One of the chief complaints of your know-nothing predecessors was that "these filthy immigrants are taking our jobs!" Then, as now, they were referring to unskilled manual labor jobs.
Poles, and Irish were oppressed, and colonized, while Southern Italians came from rural regions of Southern Italy where they weren't invested very well, and where the Italian state unified late, and neglected the Southern regions.
However, it's been awhile since Mexico was oppressed, and colonized, actually it's been nearly 200 years.
Ireland was oppressed, and colonized until about 100 years ago, and has become wealthy by even European standards.
Poland was oppressed, and under defacto colonization until about 30 years ago, and has become wealthier than Mexico, even though Mexico had a per capita income GDP twice as high as Poland in 1990, now Poland's per capita income is about 1/3rd higher than Mexico.
So, it seems even Poland's moving up fine, unlike Mexico.
Of course despite Poland experiencing much worse oppression events in the 20th century than Mexico, Poland still has much higher intellectual development than Mexico, Poland's IQ scores, PISA scores, literacy rates etc. are average, to even the high end of Europe.
Poland was even rated #2 in Europe just behind Russia in software developers, Poland of course has a recent history of faring very well in intellectual competitions like Google Code Jam, the IBM Battle of the Brains contest, the University Rover Challenge, the Google Online Marketing Challenge, and so forth.
What are Mexico's intellectual credentials, in comparison?