A big fuss is being made over Gingrich's comment that the Palestinians are an 'invented' people. I don't really understand what Gingrich was trying to get at -- this assertion is often used as a premise to deny the legitimacy of Palestinian demands for self-governance. Maybe this is what Gingrich was getting at, but he does say that he supports the idea of Palestinian statehood (as long as they don't fight for it, I guess)... so it's hard to say. Either way, his "invention" comment seems to be a non-sequiter in the context of where he spoke it, so I can only assume that he's using some sort of dog-whistle to get votes from the supremacist wing of the (Christian) Zionist movement.
Anyway, the discussion of whether any particular nation was "invented" is kinda pointless, since nationality is intrinsically a myth. All nations are invented.