It has always been my impression that when a JW goes to the door of a householder, they are there to deliver or share their message with that householder. They did not go there to listen to the householder's message. (I recall being drilled on that principle in Kingdom Ministry School back in the 1960's).
Therefore, they are not supposed to be sitting there/standing there exchanging viewpoints of their respective faiths. If the householder tries to take over the conversation, or even tries to turn it into "I'll listen to what you have to say, if you will listen to what I have to say. After all, it is a good thing to discuss things from the Bible, right?", then it is your task to turn this around and get back in control. In fact, you are even supposed to state this principle to the householder, i.e. you came to give them your message, and not to listen to theirs.
The whole point of the lesson we were taught was to remain in control. This is Jehovah's message to them, and not their message to you. This is not about fair and equitable discussion, or mutually sharing God's Word. The householder is in a false religion, while you belong to the one right religion. That's all there is to it!
Notwithstanding the lesson we were taught, I was not very obedient to that counsel. My sense of fairness and tolerance told me that I should not be so one-sided and intolerant. Besides, if I had the Truth on my side, then I should have nothing to fear, right? The Truth will always become self-evident, while error will become exposed. And I am in the "Truth", and he/she is not!
I guess that became my downfall. That's what led me to the realization that the WTBTS/GB was not right about so many things, and that's when doubt crept in, and my faith in them was utterly destroyed. It became the house that was built on sand.
Now we know the real reason they do not want you to listen to what the householder has to say. And if the ministers of different churches are now teaching their flocks to be tolerant, and witness to JW's on their doorsteps, then this may well become a whole new dimension that the WTBTS has to deal with. They are going to have to get real busy teaching the R & F JW's to become even more intolerant and close-minded, putting their blinders on, and insisting on "You will listen to my message, but I am not going to listen to yours!!!"
Rod P.