On the other hand, I had a migrant (West Indian) living in my house for several years back in the Eighties, and wouldn't hesitate to repeat the experience. They're not all as painted by the Daily Mail, not by a long chalk.
Bonkers UK laws would probably make it very difficult to get rid of the migrants from your home, even if they turned bad. They'd probably even have some crazy right of ownership after a certain amount of time. Not to mention their very different requirements (to most British people) while living somewhere. All very well the do-gooders rushing to welcome these poor folk, but the potential problems of having them share your home are huge and numerous.