I was thinking about that, too. But I still keep thinking about how killing him could affect Kale's mind.
I also noticed the furry thing, too. I found it kinda funny, actually. Considering Hugo's a furry. I think most of what Hugo said (or why) may have just been to calm Kale down.
Now that I think about it, another reason they want to kill the old Kale is that he poses a threat to them (the ones that changed him). Remember, he's looking for revenge, and he can also take control of Kale's body now, too.
Hey babe, wanna be my Final Fantasy?
I like my women the way I like my coffee. ......Wait.......I don't drink coffee.........