Why can't Ex-JW and Non-JW answer questions about JW?

I've noticed Jehovah's Witnesses getting very upset when either ex JW or non JW answer any question regarding their faith. I have answered questions completely truthfully and only fact based without slandering them or their beliefs and yet they feel like we are lying. I want to know what it is about all of us, ex/non JW alike, that makes you feel so threatened?