It's the resident Muslims they think, in their incredible ignorance, will be sent back. I really don't think you are understanding what these people are like June.
As for having nothing to do with racists they are perfectly normal most of the time. I would recommend you go to any of scores of pubs fronting the Birmingham-Wolverhampton New Road and nurse a pint and just listen but I would rather you didn't!
And yes I know immigration causes problems. Mt sister lives in Lincolnshire and it's almost impossible to get a doctors appointment because of all the Eastern Europeans. But that's rational. In the West Midlands it's all about "getting rid of the Pakis".