Muslim immigrants face so much discrimination and hostility that they don't feel they belong here, according to a liberal research group.
As part of efforts to improve integration, it called for an improvement in public behaviour towards Muslims.
And it said other Britons are wrong to worry about segregation and Muslim-dominated enclaves, as there are benefits to "residential clustering".
A report by the Joseph Rowntree Foundation found white people must do more to make Muslims feel part of the community
The report, for the Joseph Rowntree Foundation, is a strike for multiculturalism, the doctrine which encourages the development of minorities.