How do you know that the numbers are biased? All those places you've listed, for all I or you know, could be family, migrant friendly areas.
Again with the stereotypes. Your statistics are implying that Christians = white, and Muslims = POC. The uk = a stereotypical white nation, therefore there should be alarm bells ringing, when muslim children surpass the christain children in numbers? By over running us, you mean by numbers then? Numbers don't necessarily mean oppression -refugees and asylum seekers don't tend to lead rich lives.
Also, has it occured to you that no fornication is a Christain value? Therefore the mother's age can play a huge factor in the amount of children a Christain family will have. Furthermore developing nations usually tend to have a 'many children' ideology precisely because they view the child as an investment? Women in developed nations however tend to have a more 'have children later in life, therefore less children' because they have the luxury of focusing on their careers etc. Assuming those muslims are asylum seekers or refugees, they would also have considerably less education than the Christains. Is having many children actually part of muslim religion or is it just because of their circumstances?
http://www.bbc.com/news/uk-20675307
^ is an interesting article. It took 10 years, for christain population to fall around 12% and 10 years for muslim population to rise about 1% In that same 10 years, no religion rose around 11%
Perhaps those statistics you mentioned are just a little biased?
Once the conflict in each muslim's respective country quells down, there won't really be an influx of refugees coming to developed nations therefore there really isn't any risk in being "over runned" population wise IMHO.