J. Jonah Jameson may be Spider-Man's biggest detractor, but I'd never really thought about why that is outside of editorial mandate and the man just being a curmudgeon in general. To my absolute ...
John Jonah Jameson Jr. debuted in the first issue of The Amazing Spider-Man, and has been important to the hero's canon ever since, even if Jameson's hate of Spider-Man has changed with time.