My take on the last Engineer

Right, we know that the Engineers (circa 2000 years ago) planned to wipe out humanity. They readied their worst weapons and, much to their chagrin, were destroyed by their own creations. The Engineers were obviously monitoring humanity: we know this because we have paintings throughout different millenia showing us so - the film depends on this point. Keep this in mind. Cut to 2000 years later when the last Engineer is awoken by a group of space-faring humans. The last time he encountered us we were crapping in our hands and rubbing it on our faces (to quote Gary Busey). He's likely drowsy and a little disorientated, but he doesn't seem angry when he realizes what's going on. I won't say he seems amused, because that's probably reading too much in to my own version of events. Now we come to the part I've been thinking about: David has, for the duration of the film, been vocal about his views on the human race. He literally says "doesn't everyone want their parents dead". As many other's have posited, it seems likely that David relayed Weyland's words to the Engineer in such a way that it would anger him, ie. "They have come to steal your creations in order to become immortal." What he actually says is irrelevant. The film has been careful in showing us David's quiet evolution, the fact that what he actually says isn't subtitled speaks volumes. A directorial choice such as this is obviously meant to spark discussion. Regardless, at this point the Engineer turns to Weyland and his expression changes. My thought is that it looked as if the Engineer had been rethinking his position with regard to dropping a world of goo on top of Earth, when he was confronted with the Prometheus of the story. This is all fairly straightforward and seems, at least to me, fitting (without becoming akin to some of the fan theories than spanned the site before release). Strikes me as odd that there hasn't been more discussion surrounding this. Thoughts