Judicial Activism in Georgia: Judge upholds gun ban in Airport

I can't figure out how the federal judge could reach this decision. The state law says that one can carry a gun in the nonsecure areas of the terminals. I don't see what the judge's concerns have to do with anything. Fox News has a piece on the decision here:

ATLANTA — A federal judge on Monday upheld a gun ban at the world's busiest airport, dealing a blow to gun rights groups who argued a new Georgia law authorized them to carry weapons in certain parts of the Atlanta airport.

U.S. District Judge Marvin Shoob expressed concern that allowing guns at Hartsfield-Jackson Atlanta International Airport could cause significant economic damage and could be a "serious threat to public safety and welfare."

His decision rejected a request by GeorgiaCarry.org that would have temporarily allowed gun owners to carry their weapons in the airport until his final ruling on the gun ban — a challenge that could likely last months.

The legal showdown erupted when the state law that allows people with a concealed weapons permit to carry guns into restaurants, state parks and on public transportation took effect on July 1. . . .