I don't understand it at all.
He is handling this completely wrong. He should know better too. His dad played in the league. It's not like he's playing for peanuts like Robby Anderson was.
He's on his way to a $10M fifth year option.
Bad teams overspend on players. I want to keep him here forever because he's an awesome player, but not at an absurd cost. That money can be used to help Sam Darnold right now.
His dad played in the league, so he probably knows how the league works, but that also could mean he knows that this is a business and to get your money when you can. That's what Sean Gilbert taught Revis. Maybe if Instagram were around then, Revis would have been more angry online, too. He seemed to just let Geiger do his talking for him IIRC.
I just really hope the Jets don't screw this up. It's hard to know what side to be angry at. It's not a good look for Jamal to be whining on social media. It's not a good look for Joe Douglas if he's having issues with the team's best player.
The Jets have leverage in that they control Jamal's rights for a reasonable salary, but if Jamal wants to hold out and make this a big issue, he has leverage that way.