Yeah the first part is fine. He doesn't think it's long enough. Thats great... its the second part about what "his culture has endured over history since colonisation".
Perpetual victims like JT are bad for society because they omit conciousness to the ugliness of their "culture". Infanticide, cannibalism and rape towards women and the like. They walk around and pretend that Indigenous were peaceful highly moral individuals that had their lives destroyed by colonisation. It's the card they play at the slightest hint of any injustice. You could argue that JT is one of the biggest beneficiaries of colonisation we have in this country. Despite what white settlers did to his people, on the basis of morality, its only a fraction of what they did to themselves.
If my culture was categorically proven to burying up to 30% of infants alive, I wouldn't be baulking it's ruin at the hands of colonisation to prove a point on the basis of morality... unless your okay with that type of thing?