Lindelof's Assertion That Shaw Might Be Wrong

In light of what Damon Lindelof said in that Popular Mechanics Q & A, I started to think about the course of events in the movie a little differently... Bob the Engineer's less-than-friendly reception of the human visitors contributed greatly to Shaw's perception of the situation. She assumed the Engineers where heading to earth to unleash destruction. Another take on it might be that Bob got angry with their meddling and flew into a rage. Maybe it's like when you catch your child going into your toolbox to play with an electric drill? Something they shouldn't be fiddling with so you lose your temper, partially because you are looking out for their best interest. The Prometheus crew was in WAY over their heads once they started messing around with the black goo. All kinds of terrible things happened. It is entirely possible that the goo is a tool for good, for positive bio-engineering. A change agent. Their lack of understanding and meddling resulted in ALL of the problem's they encountered. Children messing around with daddy's toolbox. Bob could have wanted to kill them in order to stop them from interfering in any other future course of events. Screwing something up. I think it is entirely possible the Engineers were on a course to Earth to initiate another series of evolutionary changes. Potentially positive ones, like helping mankind make the jump in the next stage of its own evolution. Again, the notion of Shaw's perception of the situation being biased as she was not privy to all of the information.