Unlike those trying to introduce the foreign ideology of “Christian nationalism” to the UK, I actually went to church today.In a very white area,the church was full of immigrants
From a quick glance around about a quarter to a third of the congregation were not white. Add a bit more for white immigrants (the largest group thanks to the EU) and we are probably close to an immigrant majority. This in a county that is at least 90% white British and a lot of immigrants are European: https://planningpolicy.cheshirewestandchester.gov.uk/baseline-information/demographic-mix
Far from undermining Christianity, it looks to me that immigration is strengthening it.
Of course, nationalists do not want Christianity. They are cultural Christians, a diverse group that includes people from Richard Dawkins to Anders Breivik. The only thing that group shares in common is that they are not actual Christians.
Christian nationalism is very much a foreign import. It is an American import, and created by the corruption of American Christianity by racism (something I have written about before and by the worship of money (the American invention of “prosperity Christianity” demonstrates that. While these are things many countries can be accused of, the cultural impact on the US is unique. These are strange nationalists who want to impose a foreign culture on their country.
There are other huge differences between melting pot American identity and the complexities of the UK. Britishness might be English, Welsh, Scottish or Irish, or none of these. There are many minorities that have merged into the UK. What is said about Muslims now is not very different from what was said about Jews a hundred years ago, or about Catholics about a hundred years before that. Yes, some of those prejudices remain, but they are not generally shared. Ethnicity is hard to define, and “race” is just not as important to identity.
This, however, is why Christian nationalism will fail. A political movement that tries to transplant a product of another culture puts itself at a disadvantage.