This is one of the tactics used by the Ombudsman when they can’t answer a question.
To overcome the problem they just find fault in the way the question has been asked. They will often suggest that you have not been civil or that you have been rude.
Other alternatives are to suggest that you have implied that they are corrupt, biased or have colluded with the council. However, all this is just a smoke screen to put you on the defensive and hide the fact that they can’t answer your question.
The Ombudsman’s use of the 'attack is the best form of defence' tactic does at least prove that you are on the right track and that you have them on the back foot. Furthermore, the more fanatical their attack on you the more worried they are about your questions.