I'm not going to try and defend Eagles fans. There are a sht-ton of idiots there. However, to act like this is something unique to them is naive. Even Patriot fans have rioted.
From a 2016 article -
"The 10 Drunkest Super Bowl Fan Riots"
Note, the first team listed had fans rioting (fires, arrests, general mayhem).
2016 Steelers over Seahawks
1998 Broncos over Green Bay
2012 Patriots LOST to Giants
2013 Ravens over 49ers
1993 Cowboys over Bills
2004 Patriots over Carolina
2003 Raiders LOST to Bucs
2009 Steelers over Cardinals
1999 Broncos over Falcons
Winners and losers have rioted following the superbowl. Perhaps the statements in the thread should be applied to NFL fans in general?
Edit - I find it funny the Bucs didn't riot when winning in '03. But I suppose the two main reasons would be 1) town already appears to have been looted and burned to the ground, and 2) the fans are so far removed from NFL success they were stunned and unprepared to riot. I say this as a Buc fan going back to the 70's (though I gave up shortly before they actually won).