No worries, we all absolve you of guilt.
Oh, and while we're at it, you can leave now because without everything which happened before 1968 includes the occupation of Aboriginal Land, so, if you want to ignore everything before 1968 I suppose this remains Aboriginal land and we are all subjects of the UK and we all need to leave.
You see, the problem is that we benefit, every day we live here, from dispossession of Aboriginal land. So, unless we are willing to disown the dispossession, we cannot disown the responsibility for what which we benefit from every day we live here.
They go together, our living in Australia is only possible because of their dispossession.
You're not guilty, I'm not guilty, but that doesn't mean we can ignore the reason we are able to live here.
DS