Mass Effect: Wrex is not a happy battletoad

So we've tracked Saren to a secret base where he's brainwashing people and growing an army of Krogan. Apparently he's found a cure to the genophage that's slowly killing the Krogan race. Knowing how quickly Krogan can breed and how tough they are, this would be a perfect weapon. Naturally Wrex is pissed off that the cure will need to be destroyed to prevent it being misused.

Careful dude, I just got this jumpsuit back from the dry cleaner

This is one of those times when I could reload my last save and try to change events. My time machine if you will. Try as I might, Shepard's just not persuasive enough. Sorry Wrex, nothing personal. I'll just have to stick with this outcome. It adds to the immersion. A Shepard who must make tough choices, who will kill if it's necessary and live with her actions.