Abby27
Potential
I always thought the logic Willow used was decent enough. They were all overcome with grief with Buffy being gone, so I think mix that in with the notion Buffy could even possibly be in hell; I'm not surprised that they resurrected her. I mean, Glory was trying to open a portal to unleash Hell on Earth, and then Buffy got stuck in it, and then died. I don't think it's too far of a stretch to think it's possible her soul got sucked in. But it does seem then by that logic they would conclude that Buffy would come back to life in her body where ever it was: her coffin. That does prove they didn't really think it through as well as they should have.