What do you do when you know the end is coming? Make sure you are prepared.
Now, there are multiple ways to prepare for the final fight, of which, I have two interpretations for this strange theft. The first is more likely, but less heart warming.
Interpretation 1:
Knowing the end is coming, and needing to finance the purchase of weapons, survival gear, and vehicles, a band of survivors steal millions in maple syrup to finance their end of the world survival buying spree.
Interpretation 2:
Hmm, they have lots of pancakes in their survival bunker?