Talk to each other people!
That "Quick Clear" link should be made compulsory reading for everyone in emergency services working on roadways. Just as I have asked people in another thread to see the NJSP point of view in other circumstances this one it seems reasonably clear the trooper is in the wrong.
Police don't direct Firefighting operations. They outline to the Officer in Charge any operating limitations, or preferences or priorities and the Fire Service OIC has a duty to try to accomodate these. Likewise if the Fire Officer can't work within the Police limitations safely they need to talk and achieve a solution that works for both of them. If this solution can't be found the Fire Officer needs to remove Firefighters from danger, even if it means moving off the roadway completely until things change. No yelling, no guns drawn, just a considered and deliberate application of sound management principles.
The best time to resolve issues like this is with a good mutually agreed SOP worked out beforehand and with regular meetings to review the plan and keep the informal contact going.
With mutual goodwil any plan will work well, and without it any plan is doomed to failure.
New Jersey State Police !
We cover the Garden State Pky exit 127 area and also Route 9 & Rt 440, most of the troopers are pretty good to work with. sometimes we will have a wrong message sent to us on the location of a car fire or MVA from there dispatcher ! Maybe they can get " GPS "units for there cars .