He meant Idiot in the best possible way.....
Come on SM.
You we're making alot of naive noise about rocket fuels and not really taking the time to think about it.
Nick being the high octane science geek he is was venting frustration at this and attempting to set you straight, at least that how I interpret it.
It's a post about an interesting topic, and he was engaging you in a familiar (if not amiable) manner.
Don't be so explosive, like Hydrogen. Be more like alcohol. Fluid, low pressure, room temperature, produces flame not so easily.