Honest mistake, just because we know what the item was doesn't mean everyone else is going to know.
I work with 60 other firemen in our dept, and only two of us are licensed ham's, the other guy just got licensed. We have a Capt in charge of our radio equipment that wouldn't have a clue what a balun was if he tripped over it, and would also probably think it a bomb.....
It's sometimes hard to understand, but in this post Oklahoma City ~ 9/11 world, emergency responders are required to take certain steps and precautions involving everything they do. I wasn't there and will not condemn the actions taken, but if I were the incident commander of that situation, I would have explored the possibility of taking a suspicious device I couldn't immediately identify, outside of the city limits to blow it up, and not have the trip wire squad do it in a residential neighborhood.......