Shearer says Jordan's wrong to claim Toon fans have never accepted southerners at the club.
Discussing owner Mike Ashley, Shearer wrote for The Sun: "Former Crystal Palace chairman Simon Jordan spouted absolute nonsense this week that Ashley was never going to be accepted at the club because he was a southerner. What?
"It didn't seem to hold back the affection the fans at St James' Park had for Rob Lee or Les Ferdinand.
"The reason Ashley has been disliked during his ten- year tenure is because he has not invested enough to realise the club's potential.
"Among some of the other ill-informed claims Jordan made about Newcastle was that the fans expected to win the title the season after Alan Pardew took them to fifth. No, they didn't.
"This long-held view by people from outside the club that Newcastle fans have unrealistic expectations of where their club should be always leaves me perplexed."