Good points. I'll have to agree with you.
However, if Khavi were in Rayek's place, I think she would try to wipe out 'all that came before' but as she doesn't have the prejudices that Rayek did about who was a true elf or not, I have a feeling she'd make sure everyone was in the palace when she did it... even if she had to knock everyone unconcious and drag them inside to do it.
And I think she'd have fun doing it to.
Although whether she'd take the Trolls or not is another story.
But this is just my take on this. How about everyone else?