Again, this doesn't resolve the immigration isue today, but we shouldn't be too quick to say that today's immigrant groups are radically different than those who came before.
As to another post on "disproportionate" v. "wildly disproportionate." -- We can look up the figures, but I think it is something like 30% of FEDERAL prisoners are Hispanic (v. 10% of the population), but, of course, Immigration is a Federal crime, and federal prisoners are only about 10% of the national total. I think the % of all prisoners who are hispanic is about 20%, or double their proportion. It is probably hard to get ethnic figures from 100 years ago, but I'm quite confident that there were figures showing Irish (and Italian!) criminals at double their proportion in the population. If we want to do serious research, I imagine the hearings on the 1924 immigration bill, and earlier arguments over immigrant groups, would have claims. I think at one time it was claimed that over half the prostitutes in New York were Jewish.
Finally, an interesting statistic buried in the study of Black conditions in America, which has been publicized in the last few days. Unemployment rates for 20-30 years olds not in School. In the last 20 years, it is something like black rate has risen from 43 to 72%; Whites from 16 to 25% and hispanics stayed steady at about 19%. Not a figure compatible with all of "them" sitting around doing nothing.
There is a galactic sized difference between ethnic parties and celebrations by LEGAL citizens with flags present, verus the "hate America, this is our land, teach me in Spanish, hang Mexican flags in schools, I have a right to break America's laws" demonstrations.
Find me a photo of an Irish flag hanging in the classroom in that "150 year history" of yours, or of an Irish flag flying over top an upside down Old Glory on taxpayer paid school grounds.
Your comparison is farcical.