The assertion (one I personally believe) is it isn't really overt racism as much as it is one of dismissal and treatment of their concerns as less valid, for ex

The assertion (one I personally believe) is it isn't really overt racism as much as it is one of dismissal and treatment of their concerns as less valid, for example, people in other comments saying "they just look like lines," which itself is dismissive of the fact that the indigenous people there found these markings as sacred themselves. The original sin lies with the government just not treating it as important as it should be, which comes down to them not seeing the markings as being as precious and worthy of protection as say a historic building that they'd likely protect to some degree. That dismissive attitude toward one piece of cultural heritage isn't overt racism (like hurling slurs, being disciminatory, etc) but it is treatment of serious concerns without the weight they deserve.