http://indiancountrytodaymedianetwork.com/2012/09/18/aboriginal-petroglyphs-destroyed-by-vandals-armed-with-acid-and-a-drill-134572 So, apparently, vandals went through a HUGE amount of trouble to do this kind of infuriating work, just because of a (possibility) that they do not like the fact that their history would be screwed in their westernised superiority. In other words, Europeans were NOT the first people to develop a language: It was the First Nations that did.
Why am I not surprised? But at the same time, I feel very sorry for the people who discovered that and find out a group of assholes destroyed it. Ugh...