It is, but "Stand your ground" in Florida only applies to your residence and is about the use/threat of deadly force. There are other qualifications, such as, you can't "stand your ground" if the other party is there legally (ie: lives there). But, it also has this stipulation. "If the person using deadly force intentionally provoked the other party, or if the other party has already attempted to withdraw from the confrontation, the use of force is not justified under āstand your ground.ā
So going back to this case, it wasn't a deadly force situation (contrary to his claim) and he provoked it, so he would not be able to claim it even if it did apply to a public place.