Yall don't seem to see the similarities to Wano. An isolated country once feared by the world government secretly infiltrated by the very same. And the reason for isolation in the first place was the void century war.
The message being: one can't fight the world government in isolation, an international alliance like in the void century is necessary. Luffy is basically opening up one isolated country after the other, made Wano his territory even, the giant warriors are already in the grand fleet meaning Elbaf will obviously fight on Luffy's side in the final war.
Drop the culture war bs for once weebs.