Okay, I'll bite. How does anyone know what size the tank really is unless you called them and asked? What exactly is a "non-fish guy"? If someone has that size of a tank and livestock in them, doesn't that make them a "fish guy" by default? And by that same thought is that really enough to "hate" someone?
Actually, as I understand, Jesse James IS a fish guy, the aggressive species, at least.
I think his tank is too small for those sharks, there's little doubt about that. However, given who he is, he's likely to be able to place his fish at an aquarium, or upgrade his tank (if he hasn't already done it) when his sharks get too big. Remember, that doc was shot some time ago. (I guess you have to follow Bike Week and Monster Garage on Discovery to know that.)
I also think the goldfish incident was done for the benefit of his kid who was watching and the documentary crew, and to watch the fish hunt and feed. I do it with my eels from time to time (I don't use goldfish, but damsels and mollies) just for fun.