I don't think it's so clear cut from either end, the fans were definitely not baying for Robson's blood, but there was unrest as it seemed we were losing the momentum we had previously had. In his book, Robson says that Sheppard had told him that his contract would not have been renewed after the 04/05 season, and Robson had said he'd agreed to help Sheppard find a new manger. However he was sacked after 4 games, and with no back up plan from Sheppard, and hence he had to go for the only option available in Souness. When things started to unravel under Souness, the club tried to cover up Sheppard's balls up, with Douglas Hall issuing the ****y club statement "we'd have gone down under Robson". Sheppard showed throughout his reign he didn't listen to or give a **** what the fans thought, that's why he was so unpopular (but no Ashley, obviously).
Nah he was just a pussy who didn't have the heart for a fight. Its why Ferguson made mincemeat of him.
There's a reason why so many ex players like Demba, Mo, Jonas etc... have fond affection for the Toon during and after their Toon careers..... they try hard and get the respect from the fans because of it... Take note Owen you lazy get.