*WOAH* Shin megami Tensei Plot hole

Ok So I just played Shin Megami Tensei, I beat the game and got the law ending, and I just had a question that remains unanswered


When GOD floods the world, the law hero tells you that all of humanity has been cleansed from the Earth (so everybody died) now When you get to the end of the law path, the guy tells you that you(protagonist) need to tell more people about GOD so they can be saved from destruction. However he just destroyed all of human kind so what is there to saveā€¦[/details]

I thought this was kind of funny too