Why is the Ny giants call Ny not NJ?

Despite technically being in the state of New Jersey they are still in a suburb of New York City just over the state line. Very few teams are named after their state and many teams play in suburbs just outside of the city they are named for. It's obnoxious listening to idiots say they should be the New Jersey Giants. Based on this we have to call the Patriots the Foxburrow Patriots and the Bills the Orchard Park Bills. How bout the Arlington Rangers in Baseball? The list goes on and on.