King - correct me if I'm wrong, but you're relatively young with no kids. Boxy, you may fall into this same category (although I'm not sure). Regardless, it appears that you're relatively naive and ignorant on the matter.
The notion that hockey parents are nut jobs who all live vicariously through their children and think they are going to the NHL is utter nonsense. It's an outdated stereotype I too used to believe. Don't get me wrong - there are nut jobs out there (but there are in every sport, workplace, school, etc.), but I for one have no ill illusions that any of my sons are going to play in the NHL (or any other professional sport for that matter) and rarely run into a parent who seems to have that view.
That said - I am extremely passionate about my sons and the sports they pursue (which is hockey and baseball right now). I volunteer copious amounts of my free time coaching youth sports and frankly - it's one of the most rewarding things I've ever done. It's incredible to see how much an 8 year old can improve in 4 months through hard work. The transformation is remarkable. It's also amazing to see them develop social skills, leadership skills, empathy, responsibility, etc. - all those secondary benefits of youth sports. From my observations - I see similar passion, love and support in most hockey parents. These folks sacrifice their time and money - driving kids (theirs and others) all over Ontario - any day, any time. As a result - they become very invested in their children's sports teams - and yes, when they think a referee/umpire/official isn't treating their team fairly - they're going to get upset (just as they would if they felt their child's teacher was being unfair to them). I never understood this until I had kids, so I don't expect you to understand. Maybe one day you will. It's a pretty amazing feeling.
The offside example I gave was just one of many. It happened to eliminate a breakaway opportunity in a tied hockey game. Should we expect perfection from an amateur referee? Of course not, but let's also not forget that it isn't that challenging to keep up with the pace of a novice hockey game. To overrule your fellow official while being about 45 feet out of position is almost comical.
As Twisted alluded to. I don't think either of you believe it's ridiculous to get upset over a professional official, whom you think has been unfair to "your team". Think about that for a second. That fact that people get so passionate about a random sports team that they've chosen to cheer for, full of people they have little to no personal connection to is pretty pathetic in a bubble (when compared to the passion you have when cheering for your child's team). Getting upset over a ball/strike call, or a bad penalty call in a professional sporting event is, IMO, far more meaningless and laughable. Sports are just our escape from daily lives.