I don't have fear and rage. I've said already that I don't carry a knife because I'm worried about people being jerks. I carry one for the same reason I carry one when I'm on my sailboat or kayak or any other watercraft. When I'm in the water there's potential for myself or others to get caught up in leashes or underwater snares or all kinds of other **** that might be a serious problem. And I know it's unlikely, especially in the northeast, but if a shark attacks me, as much as I love sharks and would hate to hurt them, I want something better than my hands to fend the thing off. I know, blood in the water yadda yadda, but the sharks species up here are usually solitary so I'm not very concerned, and if it's come to using the knife there's blood in the water anyway.
But if someone tries to fight me in the surf, damned right I'm gonna take it as a threat to my life and safety. Like I said, if I get knocked out or held under in the water those are easy ways to drown. I'm not unreasonable to consider somebody physically assaulting me with fists in the surf to be a threat to my life. I really don't want it to ever come to that and that would really make me sad to put someone in the hospital or grave, but just don't assault people in the ocean and it won't ever be a problem. The ocean's not the place to get confrontational and enraged. The ocean is a dangerous place and it's flat out not okay to knowingly threaten others physically in that environment.