Obviously the intentions were greater than "He smacked your camera".  

And if you then drew your gun, any concealed carry class would tell you that you only draw your gun if you're prepared to use it

Oh, wait. Yeah, actually I do know that.

Yes, I would have drawn if I was carrying, defended myself from said jackass, and was faced with a mob of Brosef Stalin's politburo members. And you know what, it would have been legit:

780.972 Use of deadly force by individual not engaged in commission of crime; conditions.
Sec. 2.

(1) An individual who has not or is not engaged in the commission of a crime at the time he or she uses deadly force may use deadly force against another individual anywhere he or she has the legal right to be with no duty to retreat if either of the following applies:

(a) The individual honestly and reasonably believes that the use of deadly force is necessary to prevent the imminent death of or imminent great bodily harm to himself or herself or to another individual.

(b) The individual honestly and reasonably believes that the use of deadly force is necessary to prevent the imminent sexual assault of himself or herself or of another individual.

(2) An individual who has not or is not engaged in the commission of a crime at the time he or she uses force other than deadly force may use force other than deadly force against another individual anywhere he or she has the legal right to be with no duty to retreat if he or she honestly and reasonably believes that the use of that force is necessary to defend himself or herself or another individual from the imminent unlawful use of force by another individual.