I haven’t come across any one who has moved to US/UK from Pakistan because of lack of religious/speech freedom. Probably Ahmadis are the only ones who might have moved to UK/Europe for freedom but other than them most (if not all) have moved for higher education and economic benefits just like people goto mid-eastern countries though they are despised for same (religious/freedom issues).
People abroad are representative of Pakistan living in Pakistan, you will find them of all opinions. You will even find supporters of thugs from PPP, PML, MQM similarly you will find supporters of JI etc so why cry about that?