I think maybe it is talking about the underpinning ethos.
The law of the country.
Sure you can keep your identity and there are very strong diaspora identities in Australia but it is about changing the ethics by which that society lives.

Most of us do live by Qatari law. We know it is sharia law and I dont think any of us lobby to change it.

England has a long history of female emancipation and I dont' like it when that is undermined. That is my heritage that I was born into. When people try to change that I dont like it.
I am please when England fully penalises so called 'honour killings' they are not culturally acceptable in my country and dont try to change that.
I dont think that is racist.