This right here, is EXACTLY why Sylvanas talked Saurfang into the attack in the first place.
By your own logic. ALL Draenei should be eradicated for the simple fact that they are the Eredar. The single most destructive race to ever inhabit the Great Dark Beyond. Your race has caused more death and destruction than anyone besides demons. Death on a cosmic scale, entire planets turned to ash. That was your people, your original race.
“But, but, we left them, we are not them! We exiled ourselves!”
Well, so did the Rebel Horde when they defected. But it’s ok to kill them since you are angry at them for killing people. Maybe I am angry at you for your race destroying entire planets and causing the extinction of countless races through the universe.