When these people experienced a broader world, they realized that the things they fought over before were truly trivial.
Just like the Dark Church and the Papal Court of Light, what does fighting for thousands of years accomplish? In the face of different races, they're as fragile as paper. Perhaps, in the eyes of different races, the struggle between the two forces is akin to child's play.
"Indeed, now is the time for us to unite as one!" The Pope said solemnly, "These races want to invade Earth, turn Earth into their backyard, aim to exterminate humans, enslave humans—this is impossible! Even if we have to fight to the last drop of blood, we must not bow to the different races!"
"Hehe, how could we fear death more than our ancestors did thousands of years ago? Would we tarnish the name of Earthlings?" The Indian Snake King laughed, "As many as they come, my snake babies will eat that many. Just in time to use their corpses to nurture my little treasures!"
...
