That is an excellent question. Not only can it be asked of Jason Kelce. The question can also be posed to certain Cowboys fans, who believe their fellow Dallas fans cannot root for this franchise and spend their money on team apparel or attend any games in person, because of Jerry Jones.
Imagine being a Cowboys fan living in Philadelphia. One day that person decides, "I'm going to show off my team's colors among all these Dallas haters!"
So, they visit NFLShop.com and buys a team cap they saw Micah Parsons wear. On gameday, they attend the game at Lincoln Financial, SURROUNDED by tens of thousands of Eagles fans, who mock them, yell at them, heck, spit at them for representing Dallas in their home stadium. Pride swells inside their chest, maybe yell back, "Check my head! Suck it Egals!" Or perhaps something else more colorful, lol.
After the game, they visit their favorite Cowboys fansite, might even be CowboysZone, to interact with their fellow fans. Then they come across a post that says something like, "You're not a real fan if you are feeding Jerrah's wallet buying team merchandise!!!11!"
Wonder how that someone, breathing air within The City of Brotherly Love every day, might feel about some faceless person telling them they can only root for their mutual team unless it is by their conditions?