Eagles fan here. We are all not like that. I do tend to agree though that people in our area take great pride in being an asshole. This was obviously uncalled for.
I remember being at the Eagles-Panthers NFC Championship game. My brother had season tickets right under the press box 35 yard line in the Linc. So not the cheap seats. A dad and his teenage son were a couple rows in front of us and Carolina fans. Some drunk asshole grabbed the kid’s hat and threw it over the balcony. I will say that most of us around apologized to the guy and his son. And the usher moved them up into a suite. But it’s definitely a different animal on the east coast. Especially when dealing with Eagles, Redskins (Commanders), and Giants fans.