To play the devil's advocate, maybe they deserve to die out. If they would have innovated and conquered first, their language could have lived and ours could be the one on its deathbed. Survival of the fittest, if you will.
It's an honest question and I was hoping for some interesting answers. I was hoping someone would come along and have something interesting a la Jarred Diamond's "Guns, Germs, & Steel"[0] that may explore what role languages had on development of cultures, similar to the aforementioned book's exploration of the development of civilizations and how that led to the fateful interactions that have shaped the modern world.
No, instead of an insightful answer, let's just let our liberal outrage fly at a comment that could not possibly have any good or real intent behind it. I'm clearly just a neo-Nazi posting up in here in HN, advocating the destruction of those damn Injuns! God forbid one uses a rhetorical device!
However, I feel that nobody plays devil's advocate in good faith. In the worst case it's a shallow wrapper for "lets pretend my hate is a hypothetical" or in the best, "lets spend a few minutes kicking the skulls of innocents down the road, merely for idle argument's sake." Which evinces such a callous disregard it's hardly better than the former.
In other words "let me present my genuine opinion by wrapping it in a more presentable delivery".