I was too young to have been at such a match, and I can't remember having actually seen any footage but for some reason your description of the match rings a bell, so perhaps i've heard of it in the past.
Unfortunately anything that draws the OF together usually ends in the trading of hate filled exchanges, what they forget is that when something like that happens it immediately becomes about people, not Rangers, not Celtic , just people , the fact it was a football disaster only serves to further connect football people to the implications of such an event,but it's as people that we are effected by it. With a slight twist of fate(he watched that game from his usual spot and was standing on stairway 13 at the final whistle) I could have lost my father that day, i'd have grown up without ever knowing him, truely terrible event in Scotland's history.