The story as advertised to other nations at least, is that the Eldians ruled over all with their titan powers until they were defeated and the powers split up into nine. "Eldian Empire" sounds a lot like world domination in this context.

Obvious parallels here if Nazi Germany, but the Jews didn't have within them the power to transform into titans, so I'm not surprised that the rest of the world can get on board the hate-train - especially now that Eren stomped out a good number of foreign delegates seemingly unprovoked.

Falco's got his work cut out for him if he's going to save the world from... this. His only advantage is that he hasn't become a little ball of hate, somehow.