Originally Posted by
MirronTulaxia
It really is the same basic thing as ultimately racism and genocide. The Ascians operate entirely differently from how the heroes do. While the people they support may do wonky things (Limsa Lominsa and how it interacted with the Beast Tribes comes to mind) the heroes continually try to make the world a better place, while the Ascians at best operate on such a massive scale of death that the price is too high, even if really it isn't trying to make things better. They've been behind every major Calamity. Every shard they've killed. The Void and the First have the issues they do because of them. And no doubt other shards have issues as well that we aren't aware of, to say nothing of what they've done to the Source. They can say "oh, but they aren't human", yet there isn't any real evidence for that.
Edit: As far as whether or not what G'raha is doing is the same, time travel doesn't seem to work in such a way as killing off the former timeline, evidenced by his continued presence, so that doesn't fly. And again, it was a doomed timeline that countless people wanted to try to avert. No one would volunteer to "kill yourself and merge with the Shard". The WoD only did so because the Ascians doomed their shard to begin with, coercion hardly implies voluntary.