There is no excuse for abusing the staff, and I hope the idiot(s) get found out and banned.
With regards Laurie's comments, and general tone towards supporters, and insistence that the club is always right, it is worrying.
He blamed the supporters for ticket fiasco in home game 1, and even if he thought their messaging was crystal clear (clearly it wasn't if that many people turned up with the wrong one), there were numerous other ticketing issues that were the clubs fault (ie my issue was despite chasing in August, early Sept, and mid Sept, my sons new season ticket was never sent, even though they said it had been, and unknown to me it was waiting at the ticket office on the day of game - in those nightmare queues). I also know of other individual ticket circumstances at the fist game.
He seems to have blamed supporter for turning up with 30 mins of kick off on game 2. I am not sure what he expects to happen on a Friday night game, they must have the data from previous ones..... His comment on '13,000 wanting a drink in 15 mins' is at best an exaggeration, but potentially trying to mislead (the bars where packed all night - when they still had beer

- and I for one never went or had a drink from the bars all night - I am sure there were plenty like me).
These communications reminds me of the Muster quarter final when us supporters were told off for selling our tickets to Muster fans, no I didn't, I was there supporting my team, yet get told how disappointed the club were with me. Clearly that was pre-Laurie days, but the communication doesn't seem to have got any better.
It would have been so easy for the club to say, after both games, that they can see things went wrong (ticketing game one, bar service and running out of beer game 2), and that they are working to improve the experience for everyone. But instead we get this finger pointing at the supporters.
To echo, this in no way relates to the abuse the bar staff member got, in any circumstance, that is totally unacceptable.