lolasari. At least quarians don't nearly doom the entire galaxy by withholding until the last second knowlege about a Prothean beacon and VI sitting in an old temple that could end the game in the first act, while allowing everyone else's planets to burn simply because they don't want everyone to know that their status as being the most advanced race in the galaxy on their own merits is a contrived lie. Until, of course, their own homeworld is under siege.
If there is any race who deserved to go extinct for their own hubris, the quarians are certainly a distant second to that. Unfortunately, the game never gave me such a choice.
No race deserves to go extinct because a few people, especially their politicians, are a bunch of asshats. The asari government is composed of a bunch of irresponsible losers, and the quarian Admiralty is run by morons, but that doesn't mean their entire race should die.
Really, saying any one race deserves to go extinct because a few of them are morons or jerks is like, Nazi variety idealogy. And normally, I would hate to Godwin an argument like this, but in this case, when talking about killing off an entire species, the Holocaust is actually LESS drastic than letting the Geth or the Quarians die. I literally can't think of any other real world event on the same scale that is applicable. It's racism and genocide taken the the absolute furthest extreme, and it's wrong. It's like saying New York should be Nuked because you don't like the mayor or his policies. That is illogical and insane, and what's worse, it isn't even an exaggeration, that is LITERALLY what you are saying. You can rationalize it however you want, but if you kill the quarians, you aren't killing the ones that started the war all those centuries ago, and while you may be killing the what, three who ultimately started it up again this time, you're also letting kids, babies, and average joes who were pressured into fighting die because you're completely incapable of empathy, I guess.
So yeah. It's totally a game and all, and that's cool. If you kill the quarians or the geth in a playthrough or two because you like to roleplay a heartless monster every once in a while, hey, more power to you. But if you legitimately believe wiping an entire species out because you don't get along with a handful of its members... then speaking as a concerned human being who wants the best for his fellow man, I seriously suggest you consider the possibility of a psychological evaluation and therapy.
Really.