What has the civvies 'up in arms' is the fact that they kept the passengers and crew aboard the aircraft for two hours after landing. If the incident was serious enough to warrant a divert with military escort, then surely it was serious enough to evacuate the aircraft in a post-haste.
It happened again a few nights later aboard an Aer Arann ATR, it was diverted to Prestwick and the passengers were kept aboard.
Question : if you were aboard an aircraft with the possibility of a bomb aboard, how long would you wait?.
I spoke to a Ryanair pilot and he said that the next time it happens he will declare an emergency, do a full stop landing on the main runway and send the passengers down the chutes.