Far-right activists in Britain are increasingly adopting the rhetoric of Christian nationalism. Yet while they look to American churches for an example, their evangelical style seems unlikely to map onto Brits’ quite different attitudes toward religion.
The Great Awakening, which is where most US Christian nationalism stems from, is a pretty American homegrown phenomenon not happening in any comparable way in Europe at the time.
So no, Christian nationalism did not literally come from Britain. It is capable of appearing anywhere where Christian fanatics congregate to a great extend, and they have never congregated so much as they have and are currently doing in the US.
Thank you for this response.