Maybe he once saw the Pirates of the Caribbean with their muskets, became afraid, and thought "never again".
Mayhaps he mistook a relatives advice to "shoot a lot of pictures"
Could be that he was confused by the concept of Star Wars weekends and did not realize that a handgun with hallow points was in fact not a weapon from the saga.
Perhaps he thought his price on limited time magic of hunting on the Savanah was agreed on by Iger and word hadn't gotten back that they were going to pass for Starbucks's offer.
There's a chance he was an alien unaware of human courtesy and custom when one is in The World, and meant it as a sign of devotion and humbleness to the human race in honor of a great pact long since forged by John Carter many moons ago, and not a pointless, silly, ill concocted, selfish act of entitlement that luckily ended OK.