Why would the character think that a lightning bolt would do more damage to creatures in water?
Has the character conducted numerous experiments in the world to find this out?
If this is what he is thinking then it looks to me like a case of the player wanting to use real world knowledge that...
"a couple of older white men talking about racism? Not sure that's going to be relevatory (sic)."
Dismissing people, opinion unheard, due to their skin colour and age, isn't that the very definition of bigotry?
Yeah but the Legend details don't have the Thulsa seal of approval, and the villainous cults are the most fun! I'm hoping to get my group to play in Xoth so the sooner I have the details for all the cults (either in the Player's Guide or new GM's Guide) the better :).