(MSQ spoilers) Asahi

[Khalithar]

I wish I could have an option to say to Asahi something along the lines of:

"You'll try... and fail."
or
"You'll die worse than he did."
or
"Would you like to hear how he died?"
or
"He gave himself to a primal and after I killed it, he took his own life."
or
"You'll be even less of a challenge than that weakling."
or
"Bring it bitch."

You get the idea.

Edit:

If he's really a disciple of Zenos, shouldn't he respect us in a similar fashion? Or at least see us as an opportunity to get stronger, a goal/obstacle to overcome?

Not necessarily. Did you ever play Skies of Arcadia? The main villain is a dude named Galcian, after you kill him, his protege Ramirez vows to destroy us and the rest of the world because Galcian was the only one worthy of ruling over the world and leading it in to a new age. Sound familiar?