What other clubs? Most fans aren't really students of the game, and when you start including twitter then a lot of them won't even know much about football to start with.
Fans of many clubs in the PL have had a pop at us over the years and those of Championship clubs have whenever possible this summer.
I agree on the average Twitter fan not being the best to take notice of but to see some fans giving him such abuse after 1 game is obsurd.