A few things : McPake never denied it. The guy who started it all by putting out a picture on Snapchat saying McPake was fighting/headering folk in Braes come out the following day and said he had made that up. McPake's wife phoned him to which he said he wasn't fighting (the sensible thing to do, I'd reckon most of us would).
A reporter has got wind of it, put a status up and has later had to remove it due to McPake and Irvine being called to court.
Considering he wasn't arrested, I'm taking it it'll be the JP he's up in front of. There should be plenty of witnesses and I'd guess an array of video evidence to prove him doing right or wrong. Personally, it makes absolutely no difference to me if he's been in a scuffle.
Rumour : What I've seen elsewhere is some young boy(s) were singing the United ditty "Who's the lying on the Dens Park, who's that lying on the floor?" to James. A song of a serious injury, one that ended his career and Gary Irvine took exception to this and headered one boy - apparently causing permanent disfigurement (irony, huh?) - so McPake never actually had anything to do with any of the physical stuff.
At the end of the day, I'm sure a fair amount of us have had and will have a scuffle in a pub. It doesn't bother me in the slightest. I know others may feel differently.