would have resulted in the Commander reading the riot act
There's your answer.
Something along the lines of:
If you aren't going to do your job properly, and that is the job of a first officer not the captain, then I'll get someone who will. If you don't know what your job entails then have a look in the Part A under the heading of First Officers Duties and Responsibilities. If, after educating yourself, you decide to carry on with the same attitude I can only conclude that you are deliberately acting this way. If this is the case, then it has become a flight safety issue and not only will I offload you I will file an ASR included every minute detail of your behaviour and attitude. You have 5 seconds to make up your mind.