Dear posters if we have threads such as this then I'm sure we will have 'why blacks hate whites', 'why Greeks hate Turks', 'why Iranians hate Arabs', 'why Indians hate Pakistanis', 'why light skinned people hate dark people', 'why star Trek fans hate Star Wars fans' etc. You get the picture.
Now, these are the views of the OP, which he is entitled to. But it does not represent the views of 220 million Pakistanis in Pakistan or the expats around the world, unless you ask the majority of them.
Next, British Pakistanis (most would be against this thread) like myself love our country and are thankful that it treats us with respect and we are a very much a part of society here. Had we not been, you most certainly would never have seen a chancellor (second most powerful position in government) of Pakistani origin or the mayor of London being of Pakistani origin. Ironically you have people on here living in other countries, who have never had any minority at the helms of power, let alone Pakistani origin folk, and have also benefited generously from colonising countries in their past. But yet they hurl abuse at the UK....
You make life what it is, you take opportunity if it generously comes, or you create it yourselves.