From what
Mumbles274 said in his post, it was about far more than that. And, as someone who has two CTers on his caseload, I can say that the particular mindset that goes with it is EXACTLY the kind of thing that makes doing this kind of work frustrating. When you are trying to work respectfully and with care, and someone's trying to get a rise out of you, it's tough staying professional.
I've had a client in the past who regularly interrogated me about my own views on 9/11, and when I demurred on giving an opinion, was quite aggressive in the way they tried to goad me into stepping out of my professional role. It was all perfectly manageable, but I did feel the need to decompress after each session, and that was definitely a heartsink client when I saw their name on my case list for the day