Avatar Questions

1) The humans are destroying the Navi to get the small mineral that can be sold thousands. They don't care about if they have to destroy the whole civilization to get it. It is like before with the Americas. The conquistadors came in and killed all the natives for the land and the good things they could find on it.
2) As I said in question one, the similar conflict is the conquest of America, where the Europeans came in and destroyed every other civilization.
3) Something that is happening today is the war in Iraq. The Americans are fighting against the local people to gain control over Iraq and gain the oil that is in the country.

The Navi have extreme respect for nature. They have to sing a ritual before killing and don't hurt any plants. They are even linked to nature by their hair. They can connect with it. Nowadays, we totally don't respect nature and destroy it, by cutting rain forests, polluting rivers, Global Warming, and many more nature unfriendly things. If we adapted even a little bit of the attitude of the Navi, like respecting it for example, the Earth wouldn't be warming, and it would be a more pleasant place to live in.