Originally Posted by
Lady_Silvermoon
They are using the same method of timetravel, the Crystal Tower, that G'raha used to change the past. Also, having her try to change things and having them end up the same way isn't what happened. The timeline is preserved because she takes every step to preserve it. Also, us traveling back does change the past, by telling her about the Sundering, we cause the Sundering. So we open our mouths to get people killed, but we keep our mouths shut when we could prevent their deaths. If the time loop cannot be changed then the WoL should be able to shout from the rooftops during Pandemonium and it wouldn't matter, but we don't tell these people what is coming for them, because we need them to die so we can have their parts.
And even if it was a closed loop that couldn't be stopped no matter what we did (even though we didn't try a thing). That would not change eradicating your entire species for being weak and replacing them with what you deem a stronger species being an act of genocide. It'd just be an unpreventable act of genocide, which this wasn't, this was an act of genocide we went for at every opportunity.