After all, I don't believe this crap of an alliance of "human realms" to fight for a handful of miserables shepherds is really close to something worthy. The next war will surely be for something even more stupid, since we have seen an obvious decline in inventive reasons that lead some governments to war.
Haradrim (a handful of commoners... purley NPCs) and kidnapped kings are certainly among the "best ones".
It's a power grab, and like all power grabs it's based on a flimsy pretext. It's pure RP, sure, but the pretext itself is just flavour anyway. This one tastes right to me.