The one thing I have a problem with in the last couple of episodes is how fearful, cruel and illogical a race claiming to so advanced is.
They are clearly hyper intelligent and not part of a hive mind, so why did none of them see that murdering an entire race and non advanced life is wanton violence.
I would have been more impressed if there were secretly dissident khaylons keeping people from the builder race alive, perhaps those who were children at the time of the incident.
Extrapolating that insticnts of self preservation, instincts to protect the tribe and instincts to hoard resources from historical records of the distant past as proof that all biological life is evil and needs purging leads itself to a hypocritical outcome as well.