Evil vs Good Engineers

Hi all, Just to say I am loving the website. This is my first evrer post but rest assured I have been lurking here for the past 6 months thoroughly enjoying the discussions / banter and even arguments about this great alien universe! Why do the engineers invite us to LV223 when it is clear they hate us and want to kill us? Is it basically someknid of test to say that when we have the technolgy to get there, then they know we have become technologically advanced enoght to become a threat to them - thus they know to then wipe us out? Alternatively, I was thinking that maybe the engineers we see on LV223 were some kind of splinter group (bad guys), who don't agree with some of the life that the other engineers gave seeded around tha galaxy, hence thousands of years ago they killed the 'good' engineers based on LV223 (who we were meant to meet upon our arrival) with the agenda of devloping the black xenormorph DNA as means of wiping out any species i.e. humans they did not wnat created in the first place (perhaps they saw us as some kind of threat even before we were seeded and have basically just taken the law into their own hands and that is why they were coming to kill us??) I haven't read every single thread so apologies if I have stepped on anyones toes with this discussion....... Cheers!