The answer to why the engineers created us!

well the answer is in the movie and it is this:PURE CHANCE...BY ACCIDENT... We get the answer in the opening of the movie were the "engineer" is commiting suicide.He doesn't try to spread his dna in the river.What we see is that after he drinks the black liquid (not to be confused with the liquid the scientists find on the planet) the camera zooms and goes in to his body.What we see is that his skin and dna start to dissolve-it kinda looks like his dna starts to get burned and destroyed.Now when the body falls into the river the camera follows too.the body dissolves and the camera zooms again.the whole screen goes black and then it happens...THE TITLES BEGIN TO APPEAR.The first time I watched it (I went to the cinema twice) my attention focused on the titles.I believe this was intentional and a great idea too.It takes a while for the titles to appear completely but if you watch what happens "behind" the titles you'll see that when the blackness slowly goes away a small strand of "healthy" dna - its color is still orange and red or whatever (the same color the dna had when the camera initialy zoomed into the body when the liquid started to have its effect)- appears at the right of the screen slowly going away with the river's flow.And then something else happens:Were not in the water anymore - the colors are so different it's like they took this portion from another movie - and we see cells multiplying.WELL THAT's US!pure accident. I think this "engineer" is prometheus that took something from the race that is leaving (we see the flying saucer in the clouds - this spaceship is so different from what the engineers' are using) and they punished him by leaving him on the planet with the black liquid with one choice.Live here alone or drink the liquid and die. That is why they included so many scenes involving the black liquid they find on the planet.To confuse us and make us think that it is the same liquid. 1 the liquid in the beginning of the film is not totaly black and the texture is a bit different. 2 the effect they have is different. The engineer in the beginning dissolves but the humans mutate (although "we" have the same dna).It is not the same liquid. I base the existance of the "other" race on the fact that the pictures in the cave show a slim alien with long slim finger pointing to the stars.Well, the engineers are very muscular with normal - although bigger - fingers.They're not the same race.Perhaps after the accident of our creation this "good" race came to us and taught us everything giving us knowledge. NOW THIS MAY BE FAR FETCHED BUT: there is an explanation for the scene between vickers and her father calling him "father" just out of the blue (a weird scene).She kind hates him (she clearly tells him it is time for him to die) because he has substitued her with david the robot.In the begining her father says david is like a son to him and we see the dissaponted look on vickers face).Vickers is the "engineers".they feel betrayed because the "good" race came to us - essentialy humans are david the robot - and befriended us or whatever and they feel betrayed.that is why they hate us and want to destroy us with the virus they created and the aliens.THE ALIENS WERE THE ONES THAT WERE ENGINEERED FOR THE PURPOSE OF EXTERMINATING THE HUMAN RACE.Ripley in the other film encounters an alien race that didn't evolved naturaly, but it was created to kill the humans.They ARE the engineers but didn't "engineer" us but "engineered" the aliens for the purpose of killing us. When I saw the movie for the first time I was truly dissapointed.but now...I believe the terrible scenes with the actors acting "funny" and weird are the result of the editing.I think too much of the dialogue was left out.We'll see the final result on the dvd.and I hope I'm right. Please comment