I'm a little confused about the Flag Smashers and their agenda.

Spoiler: Flag Smashers
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We're told two things about them; that they believe that things were better during the Snap, and because of that they want a world without borders or nations. But...during the five years after the Snap, there were still borders and nations, right? I mean, granted, they've sort of glossed over that period so far and we haven't had much of a good look of what things were like. But I'm pretty sure the nations of the world weren't dissolved.

So I''m not seeing the logic of how 'things were better during the Snap' leads to 'therefore, we need to a world without borders/nations.'