Space jockeys why so angry and the intended pupose of xenomorphs

I think that the space jockeys who seeded earth were possibly rebels or revolutionaries who went against orders and seeded earth against the will of the ruling faction of space jockeys. Who have been locked in a civil war with the rebels for a large amount of time and seek to break the stalemate. This could help explain the hostility of the space jockey towards the humans in Prometheus. Maybe humans are not just reserved for earth but have been seeded on many planets in secret by these rebels maybe to be used in the future when the have evolved and developed advanced technology to help wage war against the ruling factions of space jockeys. When finding out about the misuse of bioengineering by the rebels to create a race in there image to possibly usurp the rulers the got about to engineering them selves and thus created the black goo that would decimate and re-evolve the humans on the seeded planets to something more manageable to conquer or simpler wipe out, they would properly have a way of wiping out the new species with a gas for example that would totally break down the molecular structure of the beings and leave the planet free of the dominate species whilst keeping intact its thorna and flora, atmosphere and oceans. There are a lot of ways to interpret the events and the mythos of the alien’s universe, this is but one of my ideas on it. And don’t even get me started about the amount of variants if you include yautja to the situation. But one thing im sure of is that the xenomorphs are bio-weapons similer to the monster in cloverfield and that they are used to pacify planets. But my question is are the aliens we are accustom to in existence during the events of Prometheus or is it the first step in their evolution you can see why I said predators mess things up cause the timelines don’t make sense. i would really like to hear any ideas on the orgins of all species including predators if you like, and ways the all are interlinked?