At risk of being shouted down, and I realise this is just one point of view, but I'm gonna say it anyway...
Notwithstanding that there is truth in the simple fact that the Brits came and took over this land, things could easily have been very much worse.
Consider the current state of the major Anglophile nations, - being the UK, the USA, Canada, Australia and New Zealand - are they not pretty much the most civilised and advanced and desirable places on Earth to live, from a variety of points of view?
On the other hand, consider the lot of the indigenous peeps if the Frenchies had grabbed Australia as they were about to do. How many ex-French colonies would you be happy to live in today? They all kind of fell apart when the colonial power moved out in the last 50 years or so.
Or the Belgians! Maybe a repeat of the Congo would have been more warmly welcomed in hindsight.
Imagine how things may have fared if the Chinese or Japanese had landed first, - the indigenous race may well have ended up on the menu!
So while things are far from perfect here and now for this minority group, there's no doubt that one colonial power or another was going to grab this place at around the same time as the Brits did. That's an in indisputable fact, - so while I get why they may choose not to welcome the 'invasion', it was the best possible outcome in many ways a couple of hundred years later.
That said, I propose we should replace that ridiculous 'sorry' day with a national 'Thank You' day for making this country into the fabulous place it is today
Just my 2c and no offence intended to anyone.