I don’t have much to add to this. I do notice however that in the Shires (which are still very English); the English are much more guarded about the “demographic transformation.”
It’s almost like a silent invasion (the Home Counties have changed irreversibly in a generation) and even though the terminology is somewhat loaded, the English are unused to being a minority in their own country (understandably so).
Scotland is still demographically very white British and accordingly their main animus remains with the English as opposed to immigrants (who they want).
What is interesting however (and Razib touched on this in our podcast) South Asians almost always perceive themselves to be a minority. India is so diverse that no one caste dominates and in Pakistan the birdaderi clan caste identity is important in parts of the Punjab.
So in a way South Asians haven’t internalised homogeneity as Europeans have done in the past few centuries (Treaty of Westphalia for Germany, Treaty of Versailles for the East).