[TMWNN]

>What can't be ignored is the level of racism groups are subjected to: it seems obvious to say that people will integrate better if they have people willing to integrate with them. I suspect this is far more often the problem.

I disagree. In Britain you have three groups from the Indian subcontinent:

* Indian Hindus

* Indian Sikhs

* Indian and Pakistani Muslims

Sikhs and Hindus have been very successful; they are more likely than the average to be part of the British middle class (<http://www.theguardian.com/money/2010/dec/14/middle-britain-...>). Muslims are, by contrast, worse than average in every single social measure despite being, racially speaking, indistinguishable from the other two groups to any outsider (since none knows, or cares, about the myriad of caste differences); they are all "Asians" in Britain.

Indian Sikhs and Hindus are willing to assimilate. Indian and Pakistani Muslims, far less so.