No actually FIFA isnt obliged to rematch the game at all. Well by their criteria at least.
The rematch only happens when material rules of the game have been broken.
What are material rulesof the game?
When for instance a referee shows someone a second card and forgets to send him off…
Naturally his team must win for it to be relevant at all and rematch in that case will probably happen.
But when it comes to judges decision they themselves made...right or wrong FIFA says: Judge's word is final and the law...it cannot be changed.
Thats the reason they wont oblige to a rematch. (although I admit those rules are not good and again IMO thecnique needs to start getting involved in FIFA as well)
The only way I would see them doing a rematch would be if France Football Asociation and possibly the players of France themselves would want to go with it...
Then it may happen.
However since FFA wont go with it...