Not at all unusual for LEOs to treat other LEOs poorly. I've had highway guys in South FL give me a hard time while blue lighting to an active scene. Highway guy in NYC telling a buddy who was dropping me off at the airport to stay off his highway. A sergeant who got paid off to look the other way after some drinking and carousing that went on in a local watering hole among agents from three agencies.
Inter-agency rivalries and squabbles sometimes get pretty heated up...and sometimes come to blows.
Like any other group of people, LEOs are not immune from poor judgment and bad behavior in how they treat one another.
And sometimes even banter between colleagues will get one in a jackpot with the thought police...even 20 years ago.