The butcher's conquest of the land and the seas would ultimately end in failure if he chose mass extermination of the masses over conversion.
Thus, Eren had decided to turn God Raashim's followers into his own.
But such a transformation couldn't happen overnight—it would take decades, even centuries, to shift the perceptions of the common people and low ranked mana practitioners on the island and in the surrounding regions.
The real question was, did Eren have that much time? He did not. The Witches' Sabbath was fast approaching.
There was only one way to make God Raashim's followers abandon their faith in him: to show them how powerless their god truly was in the real world, despite his Immortal status.
And the only way Eren could achieve that was by confronting him directly.