They also booed him when after being traded to the Redskins Donovan showed up to play the Eagles in Philly. Again its a rather sad fanbase ... and has been so for a looonnggg time. We are talking about folks who snowballed Santa Clause ... really?
Again, I'm not sure you really know all of the facts. I think you're repeating more legend than fact.
I recall the day McNabb came back as a Redskin - he was not booed.
Quite the contrary. When he came back to Linc with Washington that day, he received a standing ovation from the fans.
I was at Citizens Bank Park this summer when Chase Utley returned for the first time. After receiving a standing ovation when he first came to bat, he was given two curtain calls after hitting HRs against the Phillies. That is pretty unheard of for an opposing player.
And, I was present when Kimo Tinonen, a former Philadelphia Flyer, returned to the Wells Fargo Center with the Chicago Blackhawks, and received a very emotional standing ovation for two minutes while he skated around the rink and waved to the crowd. Again, pretty unheard of stuff.
The snowball incident with the guy dressed as Santa Claus happened at Franklin Field around fifty years ago.
So, I don't think your presumptions regarding Philly fans are accurate.
The general feeling in Philadelphia, with the fans, the media and most important, team management, is that Chip Kelly was a failure with the Eagles.
He traded or gave away tremendous talent - Jackson, McCoy, MacLin, Evan Mathis - for silly reasons. He tried to engineer a trade for Marcus Mariotta that backfired - he found himself with a QB - Bradford - who was not at all the right kind of QB for his system. He signed a CB, Byron Maxwell, for huge money, who turned out to be ill-equipped to play in his defensive system. He traded for a still injured middle LB - Kiko Alonzo - who was useless last year. He ran an offensive system that caused his defense to be on the field for the equivalent of two or three extra games last year.
And, he apparently alienated the entire Eagles front office.
I think that if you ask most Eagles fans in this town, they will tell you what I have told you.