BBC linkToo many Muslim organisations are "more concerned with their own preservation" than with "promoting understanding", a Conservative policy group says.
A report also attacks multi-culturalism in Britain for "tending to foster difference for its own sake".
Muslim women are "not fulfilling their career potential", it adds.
In a speech in Birmingham on Monday, Tory leader David Cameron called some Muslim extremist groups the "mirror image" of the British National Party.
He argues people must be drawn away from extremist ideologies - such as the British National Party on the one side and those Muslims who want to live under Sharia law on the other - which seek to point the blame at others and divide society, targeting the disaffected.
Come on David... Give us even more reasons to vote Tory... and we might just give you a job. How about claiming that adoption agencies may not discriminate against gays... but that may be heavily biased towards family units that have the bipolar advantage of both strength and sensitivity (still possible within gay relationships) which lets kids decide for themselves who they will become. Maybe this is one-in-a-million, but I have lesbian friends whose son is a wimp... he's going to get beaten senseless at school.