I have no personal experience with poor Mexican immigrants seeking a better life in the USA but at least their agenda is clear and strictly economical. Also, the descendants of Spanish and native Mexican indians possibly do have a fair claim there
We have an influx of Roman-Catholicism from Poland (immigrants). Fine by me. Wish they could have come sooner, say 25 years ago.
You missed my point of our many (not all !) islamic immigrants not motivated to adapt and fully live by our rules and habits: "When in Rome do as the Romans". And even abusing our system in undenyable proportions.
I also dont compare USA and Europe: 2 different worlds culture wise.