If you’re going to oversimplify the plot, do it right, goddamn it.
“White man is accepted by natives camp, not only successfully does so, but falls in love with native warrior princess. Warrior princess et al. not only grow to treat him as one of his own, but realize he’s the best native ever, better than any native has ever been. White man’s original task is to learn the ways of the natives and hopefully find and convince a diplomatic solution which involves said natives agreeing to move off the land, but eventually realizes find solace, comfort and purpose among them, vowing to fight ‘evil white corporate america men’. White man leads charge against fellow white men, thereby absolving white men’s sin and guilt.
In other words, Dances with Wolves.
There is no “infiltration”, Cameron does not go so far in insulting the audience’s intelligence. The Na’vi realize he’s an Avatar immediately. There is no “war”, it’s an allegory to the “if no peaceful way can be obtained, strike first” theory, an allegory to current international affairs. Guy does not fall in love with “enemy,” as the Na’vi are not considered enemies, simply annoying savages.