Ritically evaluate if multiculturalism is in crisis as has been recently suggested ? Please emphasise UKIP effect on multiculturalism in UK

Bibliography and references MUST follow Harvard System (Author ,page number , year)
Sources from books below must included in the Essay.
Rattansi.A.(2011)MULTICULTURALISM:A very Short Introduction . Oxford University .
Finney.N and Simpson .L(2009) Sleepwalking to segregation ? Challenging myths about race and migration .Bristol.Policy Press
Lentin.A.and Titley .G(2011) The Crisis of multiculturalism :racism in neoliberal age .London Zed
Vertovec ,S(2007)Super -diversity and its implications Ethnic and Racial Studies Taylor &Francis online Volume 30 issue 6 page
Please avoid deep analysis the subject and keep it in general terms.