If they follow our laws, don't try to change the laws to suit them (Sharia law), pay taxes and bother to learn English, work and accept and follow our customs and traditions (Don't complain about Christmas, etc) then they are welcome to stay as far as im concerned. If they don't want to do any of that or only a couple of those things, then they can bugger off, if we want to go and work/live in another country, that country would quickly throw us in jail.