Just look around Bobby Dodd Stadium on any given match day for Atlanta United FC, and you’ll see the city is abuzz with a soccer craze. Waving white towels, giant showy banners, rhythmic clapping in unison and the pounding of drums echo throughout the venue. Every few moments you hear the chants from one end of the stadium to the rest — “At-lant-a!...U-ni-ted!” — that practically send chills down your spine.