In this case, New York Giants fans, it is probably perfectly OK to root for Dallas Cowboys' wide receiver Dez Bryant. If Bryant wants to skip the season-opening game against the Giants as a protest if he doesn't yet have a long-term deal from Dallas, as ESPN's Chris Mortensen is reporting, it's absolutely fine for you to root for him to do just that.
Like the Giants have done with defensive end Jason Pierre-Paul, the Cowboys placed the franchise tag on the volatile Bryant rather than give him a long-term contract. Also like Pierre-Paul, Bryant has yet to sign his franchise tender.
The deadline for franchise-tagged players like Bryant and Pierre-Paul to negotiate long-term deals is July 15. If no long-term deal is in place by then, tagged players either have to play under the tag or sit out entirely.
Mortensen said Bryant is "contemplating" sitting out, but questioned whether he actually has the resolve to do so.
If Bryant were to actually sit out regular-season games, that certainly changes the complexion of the season-opener. Perhaps the NFC East, as well.