1) Pakistani's in UK are settled from decades, and they are very much blended in the society and fully part of main-stream British Citizens.
2) In USA Pakistani's are very new, and... ...... ....................................
i don't feel like writing.. right now. .some other time.....
are you kidding?
Pakis in UK have been there for a while but they came from the backward rural areas and they failed to adopt to modern british society and instead have retreated to isolated neighbourhoods.
Pakis in USA came in the 1980's and came here due to their education and skill and have integrated well into American society. Many of them are patriotic towards USA and don't openly plot attacks against it like the British Pakis do on a daily basis.