You're really twisting the GP's words there. Converting a sentence condemning her for being "irrational" into one claiming "I wouldn't be as tough as she is in

You're really twisting the GP's words there. Converting a sentence condemning her for being "irrational" into one claiming "I wouldn't be as tough as she is in this situation" is a mighty big leap. Even as you amended it ("if my boss did this to me..."), it's still irrelevant and focuses on the victim's behavior after the harassment, not the act itself. Now, if what you want to say is "I wouldn't be as tough as she is...", then simply go for it. It's still irrelevant, but can at least be construed as supportive to the victim. The original statement -- that she was "irrational" for staying -- cannot, and is wildly inappropriate.