You know airports well. Why don't you question why they didn't call for help (the airport security) when it has been reported that within about 3 hours after his arrival they knew he was polish - not russian and they knew he was highly stressed. They did nothing but all of you want to hang the police only for it. The airport could have defused the situation there and then - long before it came close to the police even being called.
Island pacific; I know some things all too well, and I question a lot of things too. It's not my wish to hang the police members either, the problems go a lot further up the totem pole than these four guys, but still, following orders is no excuse for doing the wrong thing.
The RCMP, or local police ARE the airport security. With all due respect to the Corps of Commissionares, (who are the only security at smaller locations), they are mainly retired police or military, and are relegated to traffic control or manning entrances to restricted areas. BTW the security screeners are not airport security, in case you were thinking of them, and they are posted at the entrance, not the exit, near were Robert Dziekanski was.
You have a closer relationship to law enforcement than I do, though a few of the younger generation of my relatives are now entering the business. There are some systemic problems within the various forces, and they flow from the top. These are the same problems that plague every large organisation, it is just that law enforcement can and does use force, sometimes lethal force, and that makes the news.
If people could learn from this tragedy at least another one could be avoided, but I don't see that happening. Too many people either will not take initiative or responsibility. Especially now in the post 9/11 hysteria era, people close ranks and take the "its not my job", "I'm not authorised", "everyone is suspect", "call the authorities", attitude. Once the authorities are called, there is no wiggle room, as Mr. Dziekanski found out.
Questioning too much is a career killer, I've done it tactfully enough, but pushing against the lethargy and inertia of government or large organisations with little result does wear you down.