User blog comment:AdmMiller/What's so great about Tali? And why do most dislike Miranda?/@comment-2036282-20100713135612

I don't think that war between quarians and the geth is so inevitable with Tali's involvement. Maybe if Shepard uses Paragon/Renegade option during conflict "Tali against Legion", Tali could get along with the geth(if she stayed loyal), when she will be promoted as "Supreme Admiral" or some kind of this(ME3). That's my opinion and speculation, nothing more.

I also do think that willingly killing characters isn't the best way to achieve goals in ME3. There would be some dialogues or events depending on specific character, which could be easily missed. And I've noticed one interesing thing during my ME 1-2 playthroughs: all the major decisions are always up to Commander Shepard. So war against the geth could not start without Shep's involvement. My theory again.

The text above is my IMHO. I just expressed my opinion on losing valuable squadmates and why the survival of all characters is preferable to me. I don't try to persuade you, so don't worry about this. I like quarians, you prefer geth. That's ok. =)