"It's not our first Apocalypse Gabriel. The Earth is beautiful, yes, and I understand you are attached to the humans but what state are we leaving them in now Gabriel? All of that suffering, that pain, for what? The few good people who don't feel it?" That was Raphael's reasoning, rationalization, for the deaths he knew they would cause - it wasn't born of hatred of humanity, but of wanting to end their suffering.

"Lucifer wouldn't toast the planet. Kill the humans, yes. Then the demons, but he wouldn't have destroyed the planet. We looked." Well. Sent Zachariah. Same thing.