I'm a white Australian and I get asked this all the time. Mostly they're just trying to make conversation and since most people at work are migrants it's a natural conversation starter. Sometimes they are looking to remind me that the only real Australians are the indigenous peoples and I am, therefore, British. This what you get labelled if you say your background is English/Irish lol. My favourite was being called British by a mixed German/Brazilian who insisted he was Spanish.

In countries with a lot of immigration and diversity I think it's natural for people to talk about this. I like hearing about what life was like for people in Tibet, or Myanmar, Eritrea, Cook Islands etc. I don't think it carries the same level of racist connotations as it used to. How are we supposed to have cultural exchange if we can't talk about our backgrounds?___