I wasn't suggesting that Christianity is a reliable indicator of Britishness (although 'nearly half' of Muslims being born here is to me a pretty shocking statistic, since it implies that the majority weren't and gained admission to the UK under what might therefore appear to be lax immigration controls (or as a result of practices like cousin marriage))
The white British people who are actually affected about social housing allocation are not middle class Guardian readers, they are working class/unemployed people. A proportion of whom join the EDL, BNP, etc.
A lot of them don't like Muslims because of terrorism/sharia law/grooming gangs/insert reason here. And then they see a large proportion of social housing allocations going to Muslims and this cements their hatred.
I'm not in any way justifying this, just explaining the inevitable. A lot of people of these groups dislike Eastern Europeans too, for the reasons I explained (competition for jobs and housing), but the conflict is much less (I believe the number of Muslims and Eastern Europeans is pretty similar).
Clearly we have a lot of immigrants in the UK, and that's not about to change, the practice of cousin marriage means that we have more Mirpuris in the UK then there are in Mirpur, for example, but it's really insulting and patronising when people claim it's all wonderful and joyous, or that it's racist for people to resent any kind of change (e.g., in the last 10 years the majority of the white British population left the borough of Barking - that's a huge change and it means all kinds of traditions and history being lost, yes there are new groups and new traditions and whatever else, but it's unreasonable to demand that everyone be happy about this).
We do have some need for immigrants; personally my view is that the 2000s Eastern European migration was unasked for by people in Britain and should not have happened and has NOT improved the country (we do not have higher wages, better living standards, better pensions as a result, and no claims about how these migrants are net contributors to the economy will change that).