After 1830 or so there is a PC reluctance to mention certain facts about the Tasmanian aboriginals that people previous to that time found glaringly obvious.

I was actually reading about Tasmanian aboriginals of that time last night. In particular I had been reminded that Melbourne was actually founded by Batman, which just seems kind of badass. Knowing that said Batman acquired some of the resources needed to found Melbourne (then "Batmania") by being rewarded for capturing a notorious bushranger made it seem even more badass. It was somewhat less rewarding to discover that Batman got most of his wealth and prominence from hunting down and massacring Tasmanian Aboriginals in the Black War, which was going on at the very time that you mention (1830).

The above leads me to devalue rather heavily that which was being said about the Tasmanian aboriginals at the time. People who are in the process of killing another group of people in order to take their land aren't the kind of people you go to for unbiased opinions about their victims.