People forget the good parts about Zash, she was a fun master to have not some dumb maniac and even after chapter 1 I don`t remember her ever asking anything from you in exchange for her help. (all the way at the end after your story is over and your on the Council does she ask you to help her win Khem`s body)

 

+ why do ppl hold it againts Zash that she wanted your body to save her life, wouldn`t any of you do the same? how can you ppl pretend to be sith and disregard the eventual master vs apprentice show down. We don`t even know how things would ve turned out if she wasn`t dieing and in need of a body....I think she would`ve kept you around until you decided that it`s time to fill the big man shoes and betray her for power.

 

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Does Zash have reasons to do what she tries to do ? Certainly. So what ?

I don't think it's hate. It's just smart getting rid of her. You're a sith, would a sith leave another sith, an enemy at that point, defeated but yet powerful, alive ? If you can, you remove the threat entirely.

Also, Khemmy knows from the very begining. "This witch stinks of sith lies"