Fan bases become less likeable when their teams start winning. Like, I don't think anyone cares about Cubs fans either way, because they didn't end up winning enough to attract a bandwagon or become annoying, after all those years of lovable loser status. Not sure Dodgers fans are any more charming. And I'm not rooting for the Tomahawk Chop!
If the Phillies cheated their way to a ring would any of us stop rooting for them?
I assume at least some of the Phillies disdain for Sox fans is from them coming down and filling the ballpark, just like the Yankees or a division rival. Right now neither the Mets nor the Nats were good enough to have that.