How will the TMT be the death of Hawaiian culture?  I don't think the evidence supports that point.  In fact the opposite seems to be supported.  After the first telescope in the late 60s, Hawaiian language and culture experienced a rebirth.  In subsequent years it has only gotten stronger with Hawaiian language and culture departments being setup at UH, with many interested students.  That didn't happen in a vacuum, Hawaii brings in money from the military and tourism, but also astronomy.  Astronomy brings in researchers from everywhere, including Cambridge, where Stephen Hawking is.  That brings prestige which money and recognition.  Hawaii is known internationally for astronomy and when people come here for that they will undoubtedly be exposed to at least a little bit of Hawaiian culture.  That's a good thing.

TMT will not harm any culture.  And in fact astronomy and Hawaiian culture have both grown together in Hawaii.  You can learn both.  That's what the evidence points to.