Mr. Thompson responded with an appeal to get his status as biggest douche in the universe overturned. "I'm not a douche!", said Thompson.
And the voice of every other species, too.
YES, finally something that makes sense! Also, the angels were hallucinations caused by alcohol withdrawal, and Kara actually dies of spontaneous combustion while Lee is off in dreamworld.
I figure that "harbinger of death" had to do with Kara leading both races to their end: Hera was mitochondrial Eve, and so only her ancestors survived and reproduced and evolved into modern sapiens.
Of course, I would interpret that as Kara having saved both races entirely, which means that the hybrids were just being melodramatic.