SOMEHOW, AT THE moment he spoke with the old woman, he realized something important.
After the Supreme Heavenly Scripture evolved, not feeling any more hungry or sleepy, his emotions had become more dented and pure. During the evolution or even before it happened, however, his personality was somewhat a bit twisted.
He just killed people then like weak ants without them initially harming him by even a little as a cause. Even if they were not innocent people, all of the people in the world, except for some children, should not be innocent at all. In other words, that was already a given.
Even he wasn't. And but he never was.
If the same logic applied, then he was someone who also deserved to be killed. It was not because they were the same or different, but because they were just not in the same shoes.