yes that is a solution...Legislation can be changed and all immigration and naturalization rights can be based on religion.
Worth a try,and see how much love this attracts from Muslim world
the first British industry to go down after any such legislation is London high end property market and 7 star hotels as most buyers there are Arabs who happen to be Muslims.
Second industry to go will be fast food which also serve as affordable prepared meal for the masses.Most owners of fast food takeaways here are Pakistanis...again who happen to be Muslims..
Then Butchery market as Halal meat is big business here and helps farmers to remain afloat...Again Muslims happen to be meat eaters big time.
Then small and medium sized shops..again mostly immigrants run them,and most are Muslims..
Last but not least,the export of British scrap metal and used cars.. mainly Muslim countries are the buyers...
Nigeria probably the biggest Buyer of British Junk (which also happens to be the country of origin of the terrorists in this incident)
Forgot to mention the big money muslims spend in buying British Franchises and taking them to their home countries..
All major British chain stores and Brands have branches in Pakistan and all arab countries...
But like i said..worth a try..Governments should change their regulation..Any business or immigration should first ask the Religion of the other party and stop if the other party is Muslim.