The UK has had immigration for some decades, resulting in these immigrants' integration in our society, some of whom successfully, others creating ghettos. The latter are the people who are coming here, to Europe, who grew up in a different religion and represent a completely different culture. Most are not Christian, but Muslim.
_If these people want to stay in our country, they should be prepared to adopt our values - *not* vice versa. A British woman wishing to visit Iran, say, knows she would have to adopt that country's religion & "culture".