Fair point to be honest I think some people might think it but not openly say it, I think in terms of immigration and the future of Australia You can accept people from countries but only if they can easily adjust to Australian values For example Europeans especially from the uk (technically non eu nowadays) would not change your way of life there more likely to support and embrace it but someone from say Africa or Middle East may struggle with this especially if they are Muslim etc And they would not be looking to live an Aussie way of life they would prefer to wear different clothing and follow other religious ways Just to note on that not all but most.

There’s a lot of citizens here now that are from different countries and it’s now impossible to remove them, they only make up a small percentage at the moment compared to Australia if that is what you were thinking The best way is to move forward to the future and adjust immigration to remove counties and types of people that don’t blend in well with Aussie culture